The hormone that maintains the secretory activity of the corpus luteum as well as the increase in the size of the mammary glands is

$A.$ Humans reproduce .....
$B.$ Humans are $\ldots \ldots$
$C.$ Fertilization is .... in humans
$D.$ Male and female gametes are .....
$E.$ Zygote is .....
$F.$ The process of release of ovum from a mature follicle is called .....
$G.$ Ovulation is induced by a hormone called ......
$H.$ The fusion of male and female gametes is called .......
$I.$ Zygote divides to form ... which is implanted in the uterus
$J.$ The structure which provides vascular connection between the foetus and uterus is called ......
Fill in the blanks in the statements $A$ to $J$ above.

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Placenta	$(i)$ Androgens
$(b)$ Zona pellucida	$(ii)$ Human Chorionic Gonadotropin $(hCG)$
$(c)$ Bulbo-urethral glands	$(iii)$ Layer of the ovum
$(d)$ Leydig cells	$(iv)$ Lubrication of the Penis

The changes that occur in females at the onset of puberty are:

Match the following columns:

Column-$I$	Column-$II$
$(1)$ Secretory phase	$(a)$ $14^{th}$ day
$(2)$ Ovulation	$(b)$ $1-5$ days
$(3)$ Luteal phase	$(c)$ $15-28$ days
$(4)$ Menstrual phase	$(d)$ $6-13$ days
$(5)$ Follicular phase	$(e)$ $15-28$ days

$I -$ Sperm,$II -$ Testosterone,$III -$ Relaxin,$IV -$ Ovum,$V -$ Estrogen,$VI -$ Progesterone.
Produced by human males $- P$
Produced by human females $- Q$
$P$ $Q$