Use of such medications can result in return of normal ovulatory cycles or make the individual more responsive to fertility drugs.
In much the same way that oral contraceptives prevent pregnancy by inhibiting normal ovulation, these drugs are used in IVF and related procedures to turn off the body's natural ovulatory cycle.
A woman's body temperature varies predictably during her ovulatory cycle and it increases at ovulation. A basal body thermometer is used daily to take the temperature immediately upon arising before leaving bed.
In a normal ovulatory cycle, a surge of LH triggers ovulation and release of the egg(s). The body responds to hCG in the same manner as it does LH, so a surge of hCG can also initiate ovulation.
Peak Day - During the ovulatory cycle, this is the day with the highest probability of conception. During this time, the cervical mucus has the consistency of egg whites and the woman will notice a spike in basal body temperature.
IUI can be performed either in a spontaneous ovulatory cycle (cervical hostility) or in a cycle with ovarian stimulating hormones (idiopathic subfertility and male subfertility/sperm antibodies).
Progesterone also causes the half-degree basal temperature elevation noted at mid-cycle during an ovulatory cycle. If the corpus luteum functions poorly, the uterine lining may not support a pregnancy.
The last fourteen days of an ovulatory cycle, associated with progesterone production from the corpus luteum.
Luteinizing Hormone (LH) ...
occur spontaneously in approximately 1 in 80 pregnancies in the United States. Fraternal twins, also known as dizygotic twins, are more common. They result when two separate eggs are fertilized by two different sperm during the same ovulatory cycle.
 See also: Ovulation, Pregnancy, Fertility, Egg, Uterine
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