01
What may be developing
Gestational age is counted from the last menstrual period; there is no embryo yet.
Fetal growth chart by week
Explore general estimates of baby size, development and common pregnancy symptoms. Every pregnancy is different; this information does not replace care from your maternity team.
01
Period & ovulation calculator
Estimate your next period, ovulation day, and fertile window.
02
Pregnancy due date calculator
Choose your last-period date or conception date to get an estimate.
03
Breastfeeding & weaning milestones
See your child’s age and the 6-, 12-, and 24-month milestones.
04
Fetal movement kick counter
Record movements during a counting session, following the plan from your maternity care team.
Default goal10 movements within 2 hours
Time elapsed00:00:00
Movements recorded0 / 10
Counting methods and goals may vary with clinical guidance. Do not wait to finish a count if you notice a decrease or change in your baby’s usual movement pattern.
A gentle guide, week by week
Your pregnancy, in context
Explore a general picture of how pregnancy may develop. Every pregnancy is different, and these estimates are not a measure of your baby’s health.
1of 40 weeks
Approximate reference
Week 1A size comparison
Week 1
Pregnancy dating begins before a fetus has formed.
Pregnancy dating starts before an embryo forms
Length—There is no formed fetus to measure yet.
Weight—There is no formed fetus to weigh yet.
Length is measured head-to-bottom through week 19 and head-to-heel from week 20. Weight is a rounded estimate, not an individual measurement.
02
What you may notice
A menstrual period may be happening; pregnancy symptoms are not expected yet.
A gentle thought for this week
Use the first day of your period as a date reference; cycle lengths vary.
Have an estimated due date?
Use it to find an approximate week. You can still choose any week above.