Fetal Membranes The fetal membranes consist of the chorion, amnion, yolk sac, and allantois. The chorion has three layers: cytotrophoblastic, chorionic connective tissue, and basement membrane.

On days 21 and 22, the yolk membrane was visualized as two parallel or circular echogenic lines separated by anechoic content. Allantoid membrane appeared as a hypoechoic membrane surrounding the ...

Brain macrophages serve diversified niches in the brain to maintain the organ’s homeostasis, and can play pathogenic roles in age-related brain disease. Hoping to one day replace dysfunctional ...

AFP (produced by the fetal yolk sac) and β-HCG (secreted by placental trophoblastic tissue) are glycoproteins that may be elevated in patients with germinomas.

The yolk sac plays an important part in the early stages of pregnancy. Find out what it does and how it works.

The manifestation of a giant ovarian yolk sac tumor during late pregnancy is relatively rare. A yolk sac tumor is a highly malignant germ cell tumor that originates from primitive germ cells. It is ...

Download this Fetal Membrane Amnion Yolk Sac Allantois Umbilical Cord Chorion And Placenta vector illustration now. And search more of iStock's library of royalty-free vector art that features Anatomy ...

The properties and potential for differentiation of fetal stem cells isolated from placental tissues must be characterized in order for them to be used in the treatment of several diseases. The ...