Title: Fetal Development
Headings: perinatology.com
Fetal Development


Content: Gestational Age 5 weeks (1.2 months) . Embryonic Age 3 weeks

The brain, spine, and heart have begun to form. By the end of the week the heart will be pumping blood. Week 5 is the beginning of the embryonic period which lasts from the the 5th to the 10th week. It is during this critical period that many birth defects occur in the developing embryo. Most of these birth defects will have no known cause or be due to a combination of factors (multifactorial). Gestational Age 6 weeks (1.4 months) . Embryonic Age 4 weeks

The embryo is now about the size of a pea. The average crown to rump length is about 0.2 inches (0.4 cm)
The eyes, nostrils , and arms are taking shape. The heart is beating at about 110 beats per minute and sometimes may be seen using a transvaginal ultrasound at this time.