Correct option is B
Trophoblast cells are responsible for producing human chorionic gonadotropin (hCG) during pregnancy. After fertilization, the developing embryo implants into the uterine lining, and the trophoblast cells form part of the placenta. These cells produce hCG, which helps maintain the corpus luteum during early pregnancy, preventing it from degenerating and ensuring continued production of progesterone for maintaining the pregnancy. hCG is the hormone detected by pregnancy tests, as it is released into the bloodstream and urine after implantation.
Information Booster:
- Trophoblast cells are the first cells of the developing embryo to make contact with the uterine lining. They help form the placenta and are the main source of hCG during the early stages of pregnancy. This hormone is vital for the continued support of the pregnancy and the development of the placenta.
- The presence of hCG in a woman's urine or blood is the basis for most pregnancy tests, which use immunoassays to detect it. hCG is typically detectable in the urine of pregnant women as early as 7 to 12 days after conception.
Additional Information:
- Pluripotent stem cells: These are cells that can differentiate into any cell type in the body, but they do not specifically produce hCG during pregnancy.
- Endometrial cells: These are the cells lining the uterus and play a role in the implantation and nourishment of the embryo, but they do not produce hCG.
- Granulosa cells: These cells are found in the ovaries and are involved in the production of estrogen and progesterone during the menstrual cycle. They do not produce hCG.
