Of the following animals which produces the smallest egg
Humming bird
Salmon
Blue whale
American toad
The shock absorber fluid of the developing embryo is known as
Location - function : Spermatid and Hyleuronidase
$A$ : Oxytocin acts on the uterine muscles and cause stronger uterine contractions, which in turn stimulates further secretion of oxytocin.
$R$ : Oxytocin is released from maternal pituitary
The estrous cycle occurs in
Which of the following represents a condition, where the motility of the sperms is highly reduced?