Translation of "Mating" in Japanese

So if we can understand the mosquito mating behavior,

だから 蚊の交尾行動を解明すれば

Mating over, she now heads underground to lay her eggs...

‎交尾が終わると ‎メスは地中に潜り産卵する

So while I was very excited that this mating was beginning,

‎交尾に立ち会えて ‎感極まったよ

And then seeing that both animals are pretty relaxed and realizing, "Okay, and then the mating is beginning."

‎２匹ともリラックスしている ‎交尾が始まったんだと ‎気づいた