A diagnosis of PCOS often arrives with the assumption that pregnancy will be difficult or impossible. The reality is considerably more encouraging. PCOS is the most common cause of ovulation related infertility and also one of the most responsive to treatment.
Most women with PCOS who want a pregnancy achieve one, usually without IVF.
Why PCOS Affects Fertility
The problem is ovulation, not the ovaries themselves. In PCOS, raised insulin and androgens prevent follicles from completing maturation, so eggs develop partway and stall rather than being released.
The eggs are generally fine. The signal telling one of them to complete maturation each month is disrupted. That is why treatment aimed at restoring ovulation works so well, and why PCOS has a better fertility outlook than most other causes.
Irregular cycles also make timing intercourse difficult, which compounds the problem even in months when ovulation does occur.
Step One: Weight and Metabolic Preparation
This is not a delaying tactic before real treatment. It is the treatment with the strongest evidence, and it improves the effectiveness of everything that follows.
A reduction of five to ten percent of body weight restores spontaneous ovulation in a substantial proportion of women with PCOS who are overweight. That is a considerably smaller change than most patients expect.
- Reduce refined carbohydrate rather than eliminating rice entirely
- Protein and fibre at every meal to blunt the insulin response
- Resistance training twice weekly alongside walking, since muscle improves insulin sensitivity
- Consistent sleep, which affects insulin resistance directly
Our dietetics team builds this around existing South Indian meal patterns, which is what makes it sustainable over the months required.
Step Two: Correcting What Else Is Wrong
Several coexisting problems reduce fertility and are simple to fix. Treating them before ovulation induction improves the response.
- Thyroid dysfunction: common in PCOS and disruptive to ovulation
- Raised prolactin: suppresses ovulation and is easily treated
- Vitamin D deficiency: widespread and associated with poorer response
- Prediabetes: identified by HbA1c or a glucose tolerance test
- Metformin: improves insulin sensitivity and can restore cycles, particularly with insulin resistance
A semen analysis for the male partner belongs here too. It is common for a PCOS diagnosis to focus all attention on the woman while a coexisting male factor goes untested for a year.
Step Three: Ovulation Induction
When ovulation does not resume with lifestyle measures, tablets are used to trigger it. This is where most PCOS pregnancies happen.
Letrozole is now first line, having been shown to produce higher live birth rates than clomiphene in PCOS. Clomiphene remains widely used and is effective for many women.
Cycles are monitored by ultrasound to confirm a follicle is developing and to time intercourse or a trigger injection. Monitoring matters because it confirms the drug is working and identifies over response.
Ovulation induction is usually attempted for around six ovulatory cycles before moving on, since most successes occur within that window.
Step Four: Injections, IUI and IVF
Where tablets fail, injectable gonadotropins stimulate the ovaries directly. These require careful monitoring, since PCOS ovaries can over respond, producing many follicles and a risk of multiple pregnancy or hyperstimulation.
IUI is combined with stimulation where there is a mild male factor or unexplained delay alongside PCOS.
IVF becomes appropriate after failed induction, or where another factor coexists such as blocked tubes or significant male factor. Women with PCOS typically produce many eggs in IVF, which is an advantage, but they need protocols designed to avoid hyperstimulation.
Laparoscopic ovarian drilling is a further option in selected women resistant to tablets, though it is used less than it once was.
Warning Signs During Treatment
Ovarian hyperstimulation is the main risk of stimulating PCOS ovaries. Contact your clinic immediately if you develop:
- Rapidly increasing abdominal swelling
- Severe abdominal pain
- Persistent vomiting
- Breathlessness
- Markedly reduced urine output
- Sudden weight gain over a day or two
Mild bloating after stimulation is expected. The features above are not, and they need same day assessment.
Once You Are Pregnant
PCOS increases the risk of several pregnancy complications, so care continues rather than ending at conception.
- Gestational diabetes: substantially higher risk, and screening is often done earlier than the usual twenty four weeks
- Pre eclampsia: increased risk, so blood pressure monitoring matters
- Preterm birth and higher caesarean rates
- Early miscarriage, at somewhat higher rates
These are reasons for closer monitoring rather than for alarm. Our high risk pregnancy service follows women with PCOS through pregnancy with early glucose screening.
The Long Term View
PCOS does not end when you conceive. After delivery, the metabolic risks remain and often increase, particularly after gestational diabetes.
Continue the lifestyle measures that helped you conceive. Have blood sugar checked at six to twelve weeks postnatally if you had gestational diabetes, and periodically thereafter. Restore cycle regulation for endometrial protection if periods remain very infrequent once you have completed your family.
Our diabetology department provides this long term follow up.
PCOS related infertility responds well to a stepwise approach, and most women conceive at the earlier steps. The most useful things you can do are to start the metabolic work early, get your partner tested at the same time, and monitor cycles rather than taking tablets blindly.
Our fertility department at T. Nagar works alongside gynaecology and dietetics for PCOS related fertility care.
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