Can I fly during pregnancy?

US airlines generally allow travel up to 36 weeks. The second trimester (weeks 14-27) is usually considered the best time to travel.

When does FMLA start?

FMLA leave can often begin before birth if medically necessary, but typically starts when the baby is born. Check with your HR department.

Pregnancy Due Date Calculator

Estimate due date and see a pregnancy timeline.

Select a starting point

Choose whether you know the first day of your last period or the exact conception date. The calculator applies the right adjustment automatically.

Last menstrual period (LMP)

Enter the first day of your last menstrual period. Obstetric dating uses this as week 0.

Date

We treat this day as week 0 and project the due date 280 days later.

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Due Date Ovulation

Estimate due date, trimester milestones, and prenatal checkpoints.

Estimated due date

October 31, 2026

Calculated 280 days from the first day of your last menstrual period.

Review this estimate with your obstetrician or midwife, especially if you have irregular cycles, underwent IVF, or have previous pregnancy complications.

Current timeline position: Week 13

Pregnancy snapshot

Gestational age: 12 weeks
Current trimester: Trimester 1
Weeks remaining: 28 weeks
Timeline week: Week 13
LMP reference: January 24, 2026
Conception estimate: February 7, 2026

Week-by-week pregnancy timeline

Track milestones, questions for your doctor, and baby development guidance each week. Highlighted cards show where you are today based on your inputs.

Week 1

Track your cycle and prep for pregnancy

Calendar window

Jan 24 – Jan 30

Doctor check-ins: Note the first day of your period, medications, and health conditions to review at your booking appointment.
Baby development: Your body sheds the previous uterine lining and begins preparing an egg for ovulation.
Self-care focus: Start prenatal vitamins with folic acid, stay hydrated, and aim for steady sleep routines.

Week 2

Support ovulation and hormone balance

Calendar window

Jan 31 – Feb 6

Doctor check-ins: Ask about timing intercourse or fertility tracking if conception has taken longer than expected.
Baby development: An egg matures in the ovary and the uterine lining thickens to welcome an embryo.
Self-care focus: Choose nutrient-dense meals, manage stress with light exercise, and limit alcohol and smoking.

Week 3

Confirm early pregnancy changes

Calendar window

Feb 7 – Feb 13

Doctor check-ins: Report any severe abdominal pain or unusual bleeding so a clinician can rule out ectopic pregnancy.
Baby development: Fertilisation occurs, the zygote divides quickly, and the blastocyst travels toward the uterus.
Self-care focus: Continue prenatal supplements, avoid high-mercury fish, and rest when fatigue strikes.

Week 4

Take a pregnancy test and plan your first visit

Calendar window

Feb 14 – Feb 20

Doctor check-ins: Call your healthcare provider to schedule confirmation labs and discuss any current prescriptions.
Baby development: Implantation completes and the embryo forms the amniotic sac and yolk sac for early nourishment.
Self-care focus: Swap to decaf or low-caffeine beverages, eat balanced snacks, and track symptoms in a journal.

Week 5

Manage first-trimester symptoms

Calendar window

Feb 21 – Feb 27

Doctor check-ins: Mention nausea, vomiting, or spotting during your booking call so tailored support can be arranged.
Baby development: The embryo's heart and neural tube begin forming and hCG levels rise quickly.
Self-care focus: Eat small frequent meals, ginger tea for queasiness, and keep emergency snacks in your bag.

Week 6

Document medical history and support needs

Calendar window

Feb 28 – Mar 6

Doctor check-ins: Share chronic conditions, previous pregnancy outcomes, and any genetic screening preferences.
Baby development: Facial features start forming, the heart beats 100–160 times per minute, and limb buds appear.
Self-care focus: Schedule rest between obligations, practise breathing exercises, and avoid hot tubs or saunas.

Week 7

Establish prenatal appointment cadence

Calendar window

Mar 7 – Mar 13

Doctor check-ins: Ask about your first ultrasound timing and any lab work required before the next visit.
Baby development: Hands and feet begin to form webbed shapes and the brain grows rapidly.
Self-care focus: Focus on protein-rich breakfasts, sip water steadily, and plan gentle walks to ease bloating.

Week 8

Monitor morning sickness and hydration

Calendar window

Mar 14 – Mar 20

Doctor check-ins: Seek help if vomiting prevents you from keeping fluids down; dehydration needs prompt attention.
Baby development: Major organs continue forming and the embryo is roughly the size of a raspberry.
Self-care focus: Carry electrolyte drinks, add lemon or mint to water, and rest with your feet elevated when dizzy.

Week 9

Discuss genetic screening choices

Calendar window

Mar 21 – Mar 27

Doctor check-ins: Review options such as NIPT, CVS, or combined screening depending on age and medical history.
Baby development: The tail disappears, eyelids form, and the embryo graduates to being called a fetus.
Self-care focus: Practise mindful eating, limit screen time before bed, and journal questions for your provider.

Week 10

Plan nutrition for steady energy

Calendar window

Mar 28 – Apr 3

Doctor check-ins: Ask about safe weight gain ranges and nutrient goals tailored to your body mass index.
Baby development: Vital organs are in place, tooth buds appear, and baby starts moving although you cannot feel it yet.
Self-care focus: Add iron-rich foods with vitamin C partners and schedule a supportive exercise class if cleared.

Week 11

Balance work, rest, and prenatal admin

Calendar window

Apr 4 – Apr 10

Doctor check-ins: Confirm upcoming blood tests, vaccination recommendations, and any workplace accommodations needed.
Baby development: External genitalia begin differentiating and the diaphragm develops for future breathing practice.
Self-care focus: Set reminders to eat every three hours, stretch your wrists and neck, and share updates with support people.

Week 12

Attend the first-trimester screening visit

Calendar window

Apr 11 – Apr 17

Doctor check-ins: Review ultrasound findings, nuchal translucency measurements, and listen for the fetal heartbeat.
Baby development: Reflexes kick in, nails form, and the digestive system begins practising movements.
Self-care focus: Celebrate milestones with a calming activity, prioritise fibre, and keep prenatal appointments organised.

Week 13

Transition into the second trimester

Calendar window

Apr 18 – Apr 24

Doctor check-ins: Ask about travel guidance, safe exercise progressions, and any red-flag symptoms to monitor.
Baby development: Baby is about the size of a lemon, bones harden, and vocal cords form.
Self-care focus: Refine your sleep setup with extra pillows and maintain steady hydration as nausea eases.

Week 14

Rebuild energy and plan routines

Calendar window

Apr 25 – May 1

Doctor check-ins: Discuss upcoming second-trimester labs and how frequently you will see your provider.
Baby development: Facial expressions appear, and the spleen starts supporting red blood cell production.
Self-care focus: Add light strength training or prenatal yoga, and pack protein snacks for work or errands.

Week 15

Track body changes and comfort

Calendar window

May 2 – May 8

Doctor check-ins: Bring up round ligament pain, skin changes, or headaches for personalised relief tips.
Baby development: Baby hears muted sounds and eyebrows and scalp hair begin to form.
Self-care focus: Wear loose layers, practise pelvic floor breathing, and note any persistent discomfort to report.

Week 16

Prepare for mid-pregnancy screening

Calendar window

May 9 – May 15

Doctor check-ins: Schedule the anatomy ultrasound and request information on optional AFP blood testing.
Baby development: Baby measures about 11 cm crown to rump and legs are lengthening quickly.
Self-care focus: Elevate your feet to reduce swelling and choose supportive footwear for long days.

Week 17

Monitor movement patterns

Calendar window

May 16 – May 22

Doctor check-ins: Ask when you should expect to feel flutters and what to do if movement seems reduced later on.
Baby development: Fat stores begin forming under the skin and the skeleton transforms from cartilage to bone.
Self-care focus: Change positions slowly to avoid dizziness and experiment with pregnancy-safe core exercises.

Week 18

Complete the detailed anatomy scan

Calendar window

May 23 – May 29

Doctor check-ins: Review ultrasound images together, confirm placenta location, and ask about cervical length.
Baby development: Ears align with the head, baby yawns and hiccups, and fingerprints develop.
Self-care focus: Practice mindful posture, stretch hips and back, and capture questions that arise during the scan.

Week 19

Protect posture and back health

Calendar window

May 30 – Jun 5

Doctor check-ins: Discuss support belts, physiotherapy options, or chiropractic care if aches intensify.
Baby development: Vernix caseosa forms to shield baby's skin from amniotic fluid exposure.
Self-care focus: Alternate sitting and standing, use a lumbar roll at work, and add magnesium-rich foods for muscle comfort.

Week 20

Celebrate the halfway milestone

Calendar window

Jun 6 – Jun 12

Doctor check-ins: Clarify anatomy scan results, weight gain trends, and upcoming glucose screening windows.
Baby development: Baby measures around 25 cm head to heel and may react to loud sounds.
Self-care focus: Schedule a prenatal massage with a certified therapist and continue mindful hydration.

Week 21

Review workplace and home adjustments

Calendar window

Jun 13 – Jun 19

Doctor check-ins: Ask about maternity leave documentation and any ergonomic accommodations your employer must provide.
Baby development: Taste buds mature and baby swallows amniotic fluid to practise digestion.
Self-care focus: Add gentle prenatal Pilates, rotate sleeping sides, and use body pillows for spine support.

Week 22

Stay alert to fetal movement cues

Calendar window

Jun 20 – Jun 26

Doctor check-ins: Learn how to perform kick counts and when to call if you notice decreased motion.
Baby development: Baby's senses sharpen and the pancreas starts producing insulin.
Self-care focus: Eat calcium-rich snacks, keep legs elevated when resting, and practise mindful breathing in the evenings.

Week 23

Plan for glucose screening

Calendar window

Jun 27 – Jul 3

Doctor check-ins: Confirm the date for your gestational diabetes test and ask about fasting requirements.
Baby development: Skin becomes less translucent and lungs begin forming surfactant for later breathing.
Self-care focus: Balance meals with protein, fibre, and healthy fats to stabilise blood sugar.

Week 24

Evaluate preterm labour signs

Calendar window

Jul 4 – Jul 10

Doctor check-ins: Request education on contractions, fluid leakage, and symptoms that require urgent care.
Baby development: Inner ear structures mature, aiding balance, and facial features become more defined.
Self-care focus: Incorporate daily stretching routines and use a supportive belly band if needed.

Week 25

Fine-tune nutrition and hydration

Calendar window

Jul 11 – Jul 17

Doctor check-ins: Discuss iron levels and whether you need supplements to prevent anemia.
Baby development: Baby gains weight steadily and responds to familiar voices and sounds.
Self-care focus: Snack on nuts, seeds, and yoghurt, and carry a water bottle during commutes.

Week 26

Practice sleep strategies

Calendar window

Jul 18 – Jul 24

Doctor check-ins: Bring up restless legs, vivid dreams, or insomnia so your provider can suggest safe remedies.
Baby development: Eyelids open briefly, and baby starts inhaling and exhaling small amounts of amniotic fluid.
Self-care focus: Adopt a calming bedtime routine with stretches, dim lighting, and limited late-night screens.

Week 27

Enter the third trimester prepared

Calendar window

Jul 25 – Jul 31

Doctor check-ins: Review upcoming appointment frequency and vaccinations like Tdap if recommended.
Baby development: Brain tissue expands rapidly and baby may develop regular sleep-wake cycles.
Self-care focus: Practise childbirth relaxation techniques and keep snacks nearby to manage hunger spikes.

Week 28

Complete glucose screening and lab work

Calendar window

Aug 1 – Aug 7

Doctor check-ins: Confirm blood test results, Rh factor management, and thresholds for calling triage.
Baby development: Eyes can perceive light, and baby adds layers of fat for insulation.
Self-care focus: Wear compression socks during long days and keep prenatal vitamins consistent.

Week 29

Review birth plan preferences

Calendar window

Aug 8 – Aug 14

Doctor check-ins: Discuss pain relief options, support people, and hospital admission procedures.
Baby development: Muscles strengthen and baby practises grasping with tiny hands.
Self-care focus: Fine-tune pelvic floor exercises, stay active with swimming or walking, and hydrate before sleep.

Week 30

Prepare for more frequent visits

Calendar window

Aug 15 – Aug 21

Doctor check-ins: Ask how often you will have prenatal checkups and what monitoring happens each time.
Baby development: Lanugo begins to shed while hair on the head thickens.
Self-care focus: Elevate legs on pillows, practise side-lying rest, and keep healthy snacks ready for sudden hunger.

Week 31

Monitor baby's position and comfort

Calendar window

Aug 22 – Aug 28

Doctor check-ins: Ask if baby is head-down yet and learn stretches or positions that may encourage optimal alignment.
Baby development: Baby perceives temperature changes and gains coordination for sucking and swallowing.
Self-care focus: Use a pregnancy support belt, adjust chair height, and practise hip-opening stretches.

Week 32

Refine hospital bag and logistics

Calendar window

Aug 29 – Sep 4

Doctor check-ins: Review hospital preregistration, emergency contacts, and when to head in for labour.
Baby development: Toenails and fingernails reach the tips of digits and fat accumulation continues.
Self-care focus: Pack postpartum essentials, arrange childcare backups, and carve out daily quiet time.

Week 33

Keep an eye on swelling and blood pressure

Calendar window

Sep 5 – Sep 11

Doctor check-ins: Report sudden swelling, headaches, or visual changes to rule out preeclampsia.
Baby development: Immune system develops antibodies passed from you through the placenta.
Self-care focus: Limit high-sodium foods, rest on your left side, and log symptoms in a shared family calendar.

Week 34

Practice labour coping techniques

Calendar window

Sep 12 – Sep 18

Doctor check-ins: Discuss childbirth classes, doulas, and any hospital policies on birthing positions.
Baby development: Baby typically settles head-down and lungs continue final maturation.
Self-care focus: Review breathing exercises, pack snacks for birth partners, and rehearse the drive to your facility.

Week 35

Finalize birth preferences and support roles

Calendar window

Sep 19 – Sep 25

Doctor check-ins: Clarify who will be in the room, visitor policies, and how to reach your care team after hours.
Baby development: Baby's kidneys are fully developed and the liver begins processing waste products.
Self-care focus: Rotate comfortable outfits, keep your phone charged, and prepare a list of emergency contacts.

Week 36

Start weekly prenatal visits

Calendar window

Sep 26 – Oct 2

Doctor check-ins: Take the Group B Strep test and review signs that it is time to head to the hospital or birth centre.
Baby development: Baby gains about half a pound per week and practises breathing motions consistently.
Self-care focus: Install the car seat, wash newborn clothes, and rehearse labour positions with your partner.

Week 37

Monitor early labour cues

Calendar window

Oct 3 – Oct 9

Doctor check-ins: Ask about membrane sweeps, induction policies, and what to do if your water breaks without contractions.
Baby development: Baby reaches early term, continues building fat, and may drop lower into your pelvis.
Self-care focus: Keep meals light, practise perineal massage if recommended, and confirm childcare coverage.

Week 38

Stay flexible about labour timing

Calendar window

Oct 10 – Oct 16

Doctor check-ins: Clarify when to contact the hospital for regular contractions or reduced fetal movement.
Baby development: Fine motor skills sharpen and grasp reflexes strengthen in preparation for birth.
Self-care focus: Alternate walking with rest, keep hospital bags by the door, and practise calming affirmations.

Week 39

Prepare for delivery and postpartum

Calendar window

Oct 17 – Oct 23

Doctor check-ins: Review pain management options, newborn procedures, and postpartum checkup scheduling.
Baby development: Baby's lungs are mature and vernix thickens to protect skin during delivery.
Self-care focus: Batch-cook freezer meals, finalise support rotas, and charge devices for birth announcements.

Week 40

Watch for active labour signs

Calendar window

Oct 24 – Oct 30

Doctor check-ins: Discuss monitoring plans if you pass your due date and confirm fetal movement expectations.
Baby development: Baby reaches full term with strong reflexes and full body proportions.
Self-care focus: Rest between contractions, practise gentle stretches, and stay hydrated with electrolyte drinks.

Week 41

Consider post-dates management options

Calendar window

Oct 31 – Nov 6

Doctor check-ins: Talk through induction methods, membrane sweeps, and additional monitoring such as biophysical profiles.
Baby development: Baby continues to gain weight and shed vernix while waiting for spontaneous labour.
Self-care focus: Keep activity light but regular, schedule daily relaxation time, and stay in close contact with your care team.

Week 42

Follow personalised medical guidance closely

Calendar window

Nov 7 – Nov 13

Doctor check-ins: Expect more frequent monitoring and follow the induction plan agreed with your obstetrician or midwife.
Baby development: Placental efficiency may decline, so your team watches baby carefully during this post-term window.
Self-care focus: Rest whenever possible, lean on support people for logistics, and communicate any change in baby's movements immediately.

This tool is for informational purposes only and should not be considered professional advice. Always follow the recommendations of your obstetrician, midwife, or healthcare provider.

Keywords

baby healthfertilitymaternity planningpregnancypregnancy planning

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The first step of your journey

The moment you see that positive test, the first question is always: "When?" The Pregnancy Due Date Calculator transforms that question into a concrete plan. Knowing your Estimated Due Date (EDD) makes the abstract idea of pregnancy real. It gives you a target to prepare for, a timeline for your medical care, and a countdown to meeting your child.

But this tool offers more than just a date. It generates a personalized roadmap of your entire pregnancy. From the "quiet weeks" of the first trimester to the "nesting phase" of the third, it breaks down the 40-week marathon into manageable milestones. It helps you anticipate morning sickness, schedule critical scans, and understand exactly what is happening inside your body today.

Whether you conceived naturally, tracked ovulation, or journeyed through IVF, this calculator adapts to your unique path, providing the clarity you need to navigate the next nine months with confidence.

More than just a date

Your due date is the anchor for your entire medical experience. Obstetricians use it to gauge if your baby is growing correctly (measuring "small for dates" or "large for dates"), to time time-sensitive tests like the Nuchal Translucency (NT) scan or Glucose Tolerance Test, and to determine if labor is premature or overdue.

While only about 4-5% of babies are born on their exact due date, having an accurate estimate ensures you and your healthcare team are aligned. It also helps you plan the logistics of life maternity leave, nursery setup, and travel windows so you can focus on staying healthy and stress-free.

Pregnancy Due Date Calculator Deep Dive

Tool Overview

The Pregnancy Due Date Calculator helps you track your pregnancy timeline based on American College of Obstetricians and Gynecologists (ACOG) guidelines.

We use the standard Gestational Age method (counting from Last Menstrual Period), which lines up with your doctor's charts.

How to Use This Calculator

Select Method: 'First Day of Last Period' is most common. Use 'Conception Date' if you tracked ovulation.
Adjust Cycle Length: Default is 28 days. If yours is longer/shorter, adjust for better accuracy.
Result: See your estimated Due Date and current Trimester status.

ACOG Dating Guidelines

Doctors typically use Naegele's Rule (LMP + 7 days - 3 months). Early ultrasound measurements (Crown-Rump Length) are considered the most accurate if they differ from LMP dating by more than 5-7 days.

Real-World Applications

FMLA & Maternity Leave

In the US, the Family and Medical Leave Act (FMLA) provides up to 12 weeks of unpaid leave. Knowing your due date helps you submit your paperwork on time to HR.

The 20-Week Scan

The Anatomy Scan usually happens between 18-22 weeks. This is a major milestone for checking fetal development and often finding out the gender.

Key Terms & Definitions

Full Term

Pregnancy is considered 'Full Term' at 39 weeks. 'Early Term' is 37-38 weeks.

Trimesters

1st: Weeks 1-13 (Risk of miscarriage highest).
2nd: Weeks 14-27 (Golden period).
3rd: Weeks 28-40 (Growth & prep for labor).

Assumptions & Limitations

Due dates are estimates. Only about 5% of babies are born on their exact due date. Most first-time moms give birth slightly after their due date.

Disclaimer: Educational use only. Consult your OB/GYN.

Pregnancy Due Date Calculator FAQs

Because most women don't know the exact day of conception. The First Day of the Last Period is a reliable, observable date. This adds about 2 weeks to the 'age' of the pregnancy compared to the embryo's actual age.

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The 20-Week Scan

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