This clinical trial is focused on studying treatments for infertility in women over 35 years old who have shown a lower response to fertility treatments in the past. The study involves comparing two different treatment approaches. One group will receive a combination of recombinant follicle-stimulating hormone (rhFSH) and recombinant luteinizing hormone (rhLH), known as Pergoveris, while the other group will receive rhFSH alone, known as Gonal-F. These treatments are part of a protocol that helps prepare the body for ovulation, which is the release of an egg from the ovary.

The purpose of the study is to compare the levels of a hormone called progesterone and the ratio of progesterone to another hormone called estradiol on the day when ovulation is triggered. This is done to see if adding rhLH to the treatment makes a difference in hormone levels and the overall response to the treatment. The study will also look at other factors, such as the number of eggs retrieved, the quality of embryos, and the chances of achieving a pregnancy.

Participants in the study will follow a specific treatment plan over a period of time, which includes receiving injections of the study medications. The study will monitor hormone levels and other indicators at various points to gather information on how the treatments are working. The goal is to find the most effective approach for women who have had a suboptimal response to previous fertility treatments.