Freeze-only versus fresh embryo transfer in a multicenter matched cohort study: contribution of progesterone and maternal age to success rates
Ange Wang, M.D., Anthony Santistevan, M.S., Karen Hunter Cohn, Ph.D., Alan Copperman, M.D., John Nulsen, M.D., Brad T. Miller, M.D., Eric Widra, M.D., Lynn M. Westphal, M.D., Piraye Yurttas Beim, Ph.D.
Fertil Steril 2017.