Pregnancy Week By Week for Android

Find out what your baby looks like during pregnancy weeks and what to do, what to avoid.

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3 trimesters, 40 weeks.

1st trimester | 2nd trimester | 3rd trimester

What happens in the first month of pregnancy?

Pregnancy is divided into 3 trimesters. Each trimester is a little longer than 13 weeks. The first month marks the beginning of the first trimester.

Most people think of pregnancy as lasting 9 months. And its true that youre pregnant for about 9 months. But because pregnancy is measured from the first day of your last menstrual period about 3-4 weeks before youre actually pregnant a full-term pregnancy usually totals about 40 weeks from LMP roughly 10 months.

Many people dont remember exactly when they started their last menstrual period thats OK. The surest way to find out gestational age early in pregnancy is with an ultrasound.

What happens during week 1 - 2?

These are the first 2 weeks of your menstrual cycle. You have your period. About 2 weeks later, the egg thats most mature is released from your ovary this is called ovulation. Ovulation may happen earlier or later, depending on the length of your menstrual cycle. The average menstrual cycle is 28 days.

After its released, your egg travels down your fallopian tube toward your uterus. If the egg meets up with a sperm, they combine. This is called fertilization. Fertilization is most likely to occur when you have unprotected vaginal sex during the 6 days leading up to and including the day of ovulation.