If you're considering waiting on children, I HIGHLY encourage you to go and have your wife's ovarian reserve markers checked. The tests you want are called AMH, AFC (antral follicle count), and FSH. Two are blood tests, one is a transvaginal ultrasound. They usually are not covered by insurance, but trust me when I say that a couple hundred dollars is MUCH less expensive than the cost of fertility treatments. Admittedly, my views are colored by my experiences. At 27, with no health problems for my husband or I, we've been unable to conceive and are on our second round of IVF- still with no answers for why my ovarian reserve is low at an early age. One in eight couples of reproductive age experience infertility. (defined as more than 1 year intercourse with protection under 35 years of age, 6 months over 35 years of age). If I had waited, it's very likely I would have been unable to have biological children. Point being- if waiting is an option on the table, make the choice with adequate information. I wish it was more common knowledge that we have ways to test for ovarian reserve in women.