Match the following and choose the correct answer:-

$A$. Implantation	$i$. Vagina
$B$. Capacitation	$ii$. Ovary
$C$. Folliculogenesis	$iii$. Uterus
$D$. Fertilisation	$iv$. Fallopian tube

Match the following columns:

Column-$I$	Column-$II$
$(1)$ Placenta	$(a)$ Stimulates uterine contraction for parturition
$(2)$ $hPL$	$(b)$ Provides nutrition to the embryo
$(3)$ Relaxin	$(c)$ Antibody in colostrum
$(4)$ $IgA$	$(d)$ Hormone secreted by placenta

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.

Eggs which contain a very small amount of yolk are called:

Explain the primary concept of the male and female reproductive systems.

In which of the following are megalecithal (macrolecithal) eggs found?