Anovulatory Infertility: Causes, Diagnosis & Treatment

Ovulation refers to the monthly release of an egg from the mature follicle— this is a natural mechanism. However, if this process is irregular or absent it is called anovulation.

Causes of Irregular Ovulation

Infertility due to ovulation problems can be caused by the following reasons:

• Hormonal imbalance– this is one of the main causes of anovulation. Disruption of hormones such as FSH, LH, estrogen and progesterone leads to anovulation or irregular release of egg. Hormonal imbalance and infertility are interconnected, as hormonal disturbances can disrupt normal reproductive function.
  
  
• Obesity– Excessive adipose tissues in the body results in increased oestrogen levels which can result in anovulation. Chronic obesity can also cause insulin resistance. High insulin stimulates androgen production from the ovaries—disrupting follicular maturation. Obesity is strongly associated with PCOS in which results in abnormal follicular development in the ovaries
  
  
• Stress— High levels of stress increase cortisol levels which suppresses GnRH secretion, resulting in disrupted ovulation triggers.
  
  
• Thyroid disorders– both hypo- and hyperthyroidism can affect ovulation

              Hypothyroidism — slows metabolism, raises prolactin, disrupts the HPO axis                   
              Hyperthyroidism — alters oestrogen metabolism and SHBG levels

• Premature Ovarian Insufficiency (POI) — in this condition the ovaries stop functioning normally before the age of 40. The follicles in the ovaries are depleted earlier than expected which leads to irregular or absent ovulation. Due to this the hormonal levels in the body are also affected — FSH rises while oestrogen falls — further disrupting the reproductive cycle and leading to anovulation.
  
  
• Congenital Adrenal Hyperplasia (CAH) — this is a genetic condition in which the adrenal glands produce excess androgens. These excess androgens interfere with the normal development of follicles in the ovaries leading to anovulation. Clinically, it can present very similarly to PCOS, making accurate differentiation between the two essential during diagnosis.
  
  
• Hypopituitarism, most commonly seen in Sheehan syndrome (with other causes including trauma or pituitary surgery), leads to reduced secretion of gonadotropins such as FSH and LH. This disruption impairs the normal ovulatory signaling pathway, resulting in anovulation and subsequent infertility.

Classification of Anovulation

WHO Group I (Hypogonadotropic hypogonadal anovulation)- This is due to hypothalamic or pituitary dysfunction— labs show low FSH, LH and estrogen.

WHO Group II (Normogonadotropic normoestrogenic anovulation) – This is the most commonly seen presentation of anovulation. The patient has normal levels FSH, LH and estrogen.

WHO Group III (Hypergonadotropic hypogonadal anovulation) — usually seen in ovarian failure. Patient labs showing high FSH, high LH and low estrogen levels.

Diagnosis of Ovulation-related Infertility

At Njinsky IVF & Fertility Clinic, doctors begin with a detailed history and examination of the couple. This gives them an idea if the patient is suffering from primary or secondary infertility–history provides important initial clues. The patient then goes through a series of scans and blood tests which lets the fertility experts know about the condition of the reproductive organs and hormonal levels in the blood. Once a diagnosis is made along with appropriate investigations showing supportive findings an individualised treatment plan is made for the patient. It is important to understand that the treatment plan may involve one of the partners (depending on the cause of infertility) or a combined plan for the couple.

There are different types of ovulation tracking tools used to predict ovulation and the fertile window. A few common ovulation tracking tools are as follows:

• Ovulation predictor kits (OPKs)- used to check LH surge(in urine) before ovulation.
• Cervical mucus monitoring
• Basal body temperature (BBT) tracking
• Wearable fertility monitors that track temperature and hormones predicting ovulation
• Fertility tracking apps

Treatment for Ovulation Issues

Infertility treatment begins after the diagnosis.lifestyle can improve some causes (e.g., obesity, PCOS). However some conditions require proper treatment with medication or advanced procedures such as IVF. Female infertility treatment most commonly involves hormonal medication for hormonal imbalances and ovulation induction. Once follicles mature and egg is released natural conception or IVF can be planned depending on the age, quality of egg and sperm and choice of the patient,

In anovulatory infertility, ovulation induction is the mainstay of treatment; however, in cases where male factor infertility is also present, male infertility treatment may involve sperm retrieval procedures such as TESA, TESE, and micro-TESE in cases of low sperm count. These techniques allow retrieval of viable sperm, which can then be used in assisted reproductive techniques such as ICSI, IVF, or IUI to achieve conception.

Treating infertility is a complex procedure and every step is taken by the consent of the couple and mutual understanding between the doctor and patient. It is important to understand the requirements of the patient and what they are willing for. It is the responsibility of the fertility specialist to counsel patients regarding all available treatment options, allowing the couple to make an informed decision after understanding the potential benefits and risks. At Njinsky IVF & Fertility Clinic, our doctors dedicate time to clearly explain each procedure, ensuring that couples can confidently make well-informed choices.