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Ovulation induction is the stimulation of ovulation by medication. It is usually used in the sense of stimulation of the development of ovarian follicles [ 1 ] [ 2 ] [ 3 ] to reverse anovulation or oligoovulation .
According to NICE guidelines of in vitro fertilization, an anti-Müllerian hormone level of less than or equal to 5.4 pmol/L (0.8 ng/mL) predicts a low response to ovarian hyperstimulation, while a level greater than or equal to 25.0 pmol/L (3.6 ng/mL) predicts a high response. [8]
It is the most widely used fertility drug. [6] Other medications in this class include tamoxifen and raloxifene, although both are not as effective as clomiphene and are thus less widely used for fertility purposes. [7] They are used in ovulation induction by inhibiting the negative feedback of estrogen at the hypothalamus. As the negative ...
Ovulatory disorders result in infrequent ovulation (Oligoovulation) or absent ovulation (anovulation) which causes infertility. The World Health Organisation (WHO) has classified anovulation into three main classes, which are hypogonadotropic hypogonadal anovulation (Class 1), normogonadotropic normoestrogenic anovulation (Class 2), and hypergonadotropic hypoestrogenic anovulation (Class 3).
Ovulation induction is usually used in the sense of stimulation of the development of ovarian follicles [5] [6] [7] by fertility medication to reverse anovulation or oligoovulation. These medications are given by injection for 8 to 14 days.
Therefore, induction of final maturation is also called triggering oocyte release from the ovary, and the administration of pharmaceutical drugs to induce final maturation is colloquially called giving a "trigger shot", even if the plan is to perform artificial oocyte retrieval before ovulation. [2] Administration of a drug to trigger oocyte ...
For those who after weight loss still are anovulatory or for anovulatory lean women, ovulation induction to reverse the anovulation is the principal treatment used to help infertility in PCOS. Letrozole and Clomiphene citrate are the first-line treatment in subfertile anovulatory patients with PCOS. [12]
It is in fact possible to restore ovulation using appropriate medication, and ovulation is successfully restored in approximately 90% of cases. The first step is the diagnosis of anovulation. The identification of anovulation is not easy; contrary to what is commonly believed, women undergoing anovulation still have (more or less) regular periods.