Generally speaking, a 13-week fetus is about 7-8 cm long and weighs about 13-22 grams. Its size at 13 weeks of pregnancy can be compared to a peach or a nectarine.
Virtually all of the fetal organs and structures are formed and will develop quite rapidly.
Read the full article on: 13th week of pregnancy: end of first trimester ( 70).
By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 02/05/2024
