A young couple has had regular,unprotected sexual intercourse for 4 years,without a pregnancy.They are seeking help at an assisted reproduction/in vitro fertilization (IVF)clinic for infertility.The husband's sperm count and sperm structure are normal.The wife undergoes a round of IVF.She must inject herself with FSH,which produces large antral follicles visible on ultrasonography.She is then given an LH injection,and her eggs are collected in a long needle by transvaginal approach 16 hours later.The FSH injections have the following effect on the ovary:
A)Increase LH receptor expression in the theca B)Increase androstenedione production C)Stimulate oocyte maturation D)Increase CYP19 (aromatase)expression in the granulosa cells E)Induce luteinization