It’s 1,000,000,000 BC. One amoeba is talking to another: “Boy, we sure have come a long way. Just think, our forefathers were just a blob of protein.” Second amoeba responds: “Yeh, but the best minds in our entire race still can’t figure out how the transition from just being blobs to become living, mobile amoebas like us came about.”
According to evolutionary biology experts, there are NO cases of asexual mammals. Thus, we must deduce that there was not just a single design for the first true mammal, but in fact there obviously had to be two separate, though synergistic interrelated designs, one for males and one for females, that had to evolve simultaneously. Otherwise, reproduction of each successive generation in the evolutionary process could never have taken place.
While we all know the basic facts that, for mammals, females provide the eggs and males the sperm that kicks off the process leading to an embryo, we perhaps may have never taken the time to really consider the complexity of these two radically different yet interdependent systems of anatomical organs and internal plumbing so essential to this process. The utter dependence of the internal fertilization process on integration and actions of two differing reproductive anatomies, their multiple hormones and the concordant duet by two independent nervous systems is mind-bending.