Select the odd one out regarding the cells/layers associated with early embryonic development.

Two offspring developed in the same uterus but from the fertilization of two different ova are:

When mammary glands of a male develop similar to that of a female,this condition is known as:

Approximately how many ova are released during the reproductive life cycle of a human female?

Which of the following statements are correct regarding the female reproductive cycle?
$A$. In non-primate mammals,cyclical changes during reproduction are called the oestrus cycle.
$B$. The first menstrual cycle begins at puberty and is called menopause.
$C$. Lack of menstruation may be indicative of pregnancy.
$D$. Cyclic menstruation extends between menarche and menopause.
Choose the most appropriate answer from the options given below.

Ovulation can be detected by