Placenta is the region, where
Foetus is supplied by maternal blood
Embryo is attached to mother by umbilical cord
Foetus receives maternal blood and nutrition
Embryo is enclosed by membranes
Hormones secreted by the placenta to maintain pregnancy are
During pregnancy the level of which hormones are increased ?
After one month of pregnancy, the embryo's $...A....$ is formed. By the end of the $.....B...$ month of pregnancy, the foetus develops limbs and digits. By the end of $\ldots$... most of the major organ systems are formed for example, the limbs and external genital organs are well-developed. By the end of $...D....$ the body is covered with fine hair, eyelids separate, and eyelashes are formed. Here$ A$ and $D$ refers to
The hormone released from placenta is
During the development of embryo which of the following occur first