The exact pathophysiology of PCOS is not clearly known. Numerous genetic & environmental factors act & contribute to its pathophysiology.
Reasons :
Excessive production of Androgen especially from the ovaries & from adrenals in 50 % of women.
Causes :
Hyperinsulinemia
Increased Testosterone level
Increased Androstenedione Level
Clinical Manifestation of increased Androgen:
Hirsutism
Acne
Androgenic Alopecia
Dislipidemia
Oligomenorrhoea
Amenorrhea
Infertility
Acanthosis Nigricans
Hirsutism
Excessive growth of dark & coarse hair in male-like patterns in females due to excess production or secretion of Androgen Hormone by the ovaries or Adrenal glands.
Androgenic Alopecia
The primary culprit/wrongdoer is the Dihydrotestosterone Hormone (DHT) that comes from testosterone. The DHT hormones attack the hair follicles causing hair loss & no growth.
Dislipidemia
Occurs due to abnormal levels of Lipids in the blood.
Oligomenorrhea
It is a condition during which females have infrequent menstrual periods. PCOS causes an imbalance in female hormonal levels along with the formation of fluid-filled cysts within the ovaries & secretion of a larger amount of male hormones called Androgen.
Amenorrhea
The absence of regular menstrual cycles is one of the symptoms of Amenorrhea. Primary Amenorrhea is when you get a delayed Menarche or you do not get your first menses within the normal age of 11 – 15 years. Secondary Amenorrhea is when a woman misses her menses for 3 months in a row or more. A woman can suffer from headache, vision changes, nausea, excessive facial hair, hair loss, changes in the breast, secretion of milky fluids of discharges from
Infertility
This is a condition when a woman is not able to conceive even after having continuous unprotected coitus for a year. This may happen due to anovulation or no folliculogenesis due to PCO.
Acanthosis Nigricans
Skin thickened & pigmentation commonly appears at the nape of the neck, groins, axilla, etc. This atypical skin cell growth is most commonly triggered by high levels of insulin in the blood.
Disorders to be ruled out
Idiopathic hirsutism
Androgen secreting tumor of the ovary
Late-onset of CAH / nonclassical CAH
Rule out CAH(Congenital Adrenal Hyperplasia) by measuring 17 OH progesterone to differentiate from PCOS.
Endometrial Hyperplasia – Increased risk of Endometrial CA, Ovarian CA, Breast CA
Due to obesity – Sleep Apnea, NASH, Depression
Diabetic Medication (due to insulin resistance)
OHSS is a complication of ART techniques. All ovulation-inducing drugs directly or indirectly increase the FSH hormonal levels. Several numbers of follicles are stimulated & each follicle releases 150 – 200 PG of Estrogen follicles. Once the follicles ovulate, they release follicular fluid containing inflammatory mediators. Vascular endothelial growth factor (VEGF) is the utmost mediator of OHSS. The most important trigger for OHSS is HCG injection.
Complications in pregnancy due to PCOS
Abortion or stillbirth due to Low progesterone levels