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Answer :
Select the hormone that is not secreted by the placenta:
- (1) hCG
- (2) Estrogen
- (3) Progesterone
- (4) LH
The hormone that is not secreted by the placenta is Luteinizing Hormone (LH). LH is produced by the anterior pituitary gland, not by the placenta. In contrast, the placenta does secrete hormones such as human Chorionic Gonadotropin (hCG), Estrogen, and Progesterone, which are important for maintaining pregnancy.
During implantation, the blastocyst becomes embedded in which layer of the uterus:
- (1) Perimetrium
- (2) Endometrium
- (3) Myometrium
- (4) Trophoblast
During implantation, the blastocyst embeds itself in the Endometrium, which is the innermost lining layer of the uterus. This lining provides the necessary nutrients and support for the early stages of pregnancy.
Embryo is termed a fetus after about:
- (1) 8 weeks
- (2) 9 months
- (3) 4 months
- (4) 3 weeks
An embryo is termed a fetus after approximately 8 weeks of development. At this point, all major organs have begun to form, and the basic structure of the body is present.
- The pregnancy test is based on detection of:
- (1) Progesterone
- (2) Estrogen
- (3) hCG
- (4) LH
The pregnancy test is based on the detection of Human Chorionic Gonadotropin (hCG) in a woman's urine or blood. hCG is produced by the placenta shortly after a fertilized egg attaches to the uterine lining.
- How many eggs and sperms are required to produce "non-identical" (fraternal) twins?
- (1) One egg and one sperm
- (2) One egg and two sperm
- (3) Two eggs and one sperm
- (4) Two eggs and two sperms
To produce "non-identical" (fraternal) twins, two eggs and two sperms are required. Fraternal twins occur when two separate eggs are fertilized by two separate sperm cells, leading to the development of two genetically unique siblings.
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