n.
a hormone secreted during pregnancy by the placenta which stimulates continued production of ...
Oxford Dictionary
n.
a hormone produced in the human placenta that maintains the corpus luteum during pregnancy.
Oxford American Dictionary
n.
a hormone produced in the human placenta that maintains the corpus luteum during pregnancy.
Oxford Dictionary
n.
a test made in early pregnancy to detect congenital abnormalities in the fetus, in which a ...
Oxford Dictionary
n.
a test made in early pregnancy to detect congenital abnormalities in the fetus. A tiny tissue ...
Oxford American Dictionary