Abortion is restricted in many US states, including 13 where the procedure is illegal at any stage of pregnancy. Most abortions in the US take place before the embryo is visible to the naked eye.

Poor prognosticators: calcified yolk sac and expanded amnion sign. Transvaginal sagittal grayscale ultrasound image in a 27-year-old pregnant patient shows an 8-mm embryo (calipers) without cardiac ...

What Vanessa Drummond, 27, initially thought was the beginning of a new chapter turned out to be something completely unexpected: a rare condition known as Gestational Trophoblastic Disease (GTD). It ...

Testing positive on a pregnancy test then getting a negative result later can soon turn happiness into sorrow. One of the common causes of a miscarriage is an anembryonic pregnancy, or blighted ovum ...

Researchers have developed a new stem cell model of the mature human amniotic sac, which replicates development of the tissues supporting the embryo from two to four weeks after fertilization. This is ...

Microscopy image of a PGA at day 8 showing the early tissues supporting the embryo, including the amniotic sac and the yolk sac-like structures, surrounded by (extra-embryonic) mesoderm tissue.

Researchers at the Francis Crick Institute have developed a new stem cell model of the mature human amniotic sac, which replicates development of the tissues supporting the embryo from two to four ...