Why so many sperm cells?

TL;DR

This paper explores the evolutionary reasons behind the large number of sperm cells and the intense selection process they undergo to reach the oocyte, highlighting the need for interdisciplinary research to understand this phenomenon.

Contribution

It proposes a new perspective on sperm redundancy and selection, emphasizing the importance of interdisciplinary approaches to uncover underlying mechanisms.

Findings

Large sperm redundancy may serve as an evolutionary strategy.

Intense selection process ensures only the most viable sperm reach the oocyte.

Calls for interdisciplinary research to understand fertility and sperm dynamics.

Abstract

A key limiting step in fertility is the search for the oocyte by spermatozoa. Initially, there are tens of millions of sperm cells, but a single one will make it to the oocyte. This may be one of the most severe selection processes designed by evolution, whose role is yet to be understood. Why is it that such a huge redundancy is required and what does that mean for the search process? we propose to discuss here these questions and consequently a new line of interdisciplinary research needed to find possible answers.