Frozen embryo Transfer on first round of IVF?

Natasha

I just had a consult with my RE and he said that he wanted to skip a fresh transfer and wait a month to do a frozen transfer. I’m really confused as to why? He said it would be best to allow uterus to return to normal before implanting. I’m 31, had bilateral hydrosalpinx (both tubes were removed this month), and my husband has above average sperm. He said it’s the standard now, but I have never heard of this. I would appreciate any feedback! Thanks!