How do you split ivf costs

My husband and I have separate accounts (just works better that way) since we make almost equal income, his is a little more. How do you split <a href="https://glowing.com/glow-fertility-program">ivf</a> costs? We usually split things equally but I feel like since I’m doing all the “physical” work of <a href="https://glowing.com/glow-fertility-program">ivf</a> he should pay more, no?