Which of the following hormones is not secreted by the human placenta?

Hormones secreted by the placenta to maintain pregnancy are

Assertion : After ovulation,the Graafian follicle transforms into corpus luteum.
Reason : The corpus luteum secretes a large amount of progesterone.

Which of the following is false for progesterone?

Women who consumed the drug thalidomide for relief from vomiting during the early months of pregnancy gave birth to children with:

The brain and spinal cord are derived from which germ layer?