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The Endowment for Human Development
The Endowment for Human Development
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Slideshow: Slideshow 1

Posterior Surface of Left Thigh

#182, Slide 14 of 19

3 months

From The Biology of Prenatal Development.Buy Now

Label Key:

1. biceps femoris tendon
2. semitendinosis tendon
3. umbilical cord
4. scrotum
5. penis
All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
Fertilization BeginsThree-Cell EmbryoEarly BlastocystImplantation Well UnderwayThe 4-Week EmbryoVitelline Vessels and Yolk SacHand Plate and Vital OrgansHand, 7 Weeks Pregnant7½-Week EmbryoRight Eye and Facial Profile9-Week Fetus, MRI AnimationExit Stage LeftPosterior Surface of Left ThighStill HidingThe MouthFace, 27-Week FetusFace and Left ForearmReady for Birth and Beyond
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