Reader-supported. When you buy through our links we may earn a commission — it never changes what we recommend.
Pregnancy Tracker · First trimester

13 Weeks Pregnant

Size of a
Peapod
Length
2.9"
Weight
0.8 oz
General information, not medical advice. Every pregnancy is different — bring questions to your OB or midwife.

Your baby at 13 weeks

Fingerprints are forming, vocal cords are developing, and the intestines move from the umbilical cord into the abdomen. Bones are hardening, especially in the skull and long bones.

How you might feel

Welcome to the tail end of the first trimester — many people feel a bit more like themselves.

This week's tip: Book a dental checkup; pregnancy hormones can affect your gums, and dental care is safe and important.
← Week 12All weeksWeek 14
Helpful right now
Best pregnancy pillows →Pregnancy stage guide →
Sources: Mayo Clinic — Fetal development week by week, American College of Obstetricians and Gynecologists (ACOG), Cleveland Clinic — Fetal Development, NHS — Pregnancy week by week, AAP HealthyChildren.org — Prenatal & Pregnancy.