Macrogametocyte

Macrogametcyte is a large portion of nutrient-poor sperm, which is released during the male's estrus period and is intended for copulation with the female during the first mating season (while the male has no reproductive experience).

In general, sperm is very rich in nutrients, but after mating there is a process that causes a change in the female's hormones during ovulation - that is, just a couple of hours after mating, the sperm becomes unsuitable for further reproduction.