Oogenesis is different from that of spermatogenesis in the following aspects
Reasons
(i) Unequal cell division makes the ovum much larger than the other three polar bodies. Because ovum has more cytoplasm and more organelles, it has a better chance of surviving.
(ii) The male makes millions of tiny sperms while, the female makes only one egg per month that also waits for second melotic division, until just before fertilisation. This is a way of conserving energy.
(iii) Sperm is smaller and motile as it has to move out of male system to female reproductive system. Larger egg has abundant reserve food so that embryo starts developing right after fertilisation.
