Is IVF safe for a 34-year-old woman with type 1 diabetes?

Question

Hello doctor,

My wife is 34 years old and has had type 1 diabetes since she was 16. Pregnancy planning has become very stressful for both of us. Her A1C is 8.2 percent, which her endocrinologist says is too high for a safe pregnancy. However, she has not been able to achieve better control even with the Dexcom G6 and an insulin pump.

She uses Humalog in her pump but continues to have dawn phenomenon spikes reaching 280 to 300 mg/dL that do not come down until the afternoon. Her periods are irregular, occurring every 35 to 45 days, and we have been trying to conceive for 18 months.

The fertility specialist reports that her AMH is low at 0.8 ng/mL and recommends starting IVF, but only after her diabetes is better controlled. She is also experiencing frequent urinary tract infections and yeast infections, which makes the situation more difficult.

What glucose targets should she aim for before pregnancy?
Can Metformin be added to help with insulin resistance even though she has type 1 diabetes?

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I have gone through your query and understand your concern.

I can hear how exhausting and emotionally heavy this has been for both of you. Planning a pregnancy with type 1 diabetes (an autoimmune disease that prevents your pancreas from making insulin) is demanding even under ideal circumstances, and what you are describing would be stressful for any couple.

Your endocrinologist is correct that an A1C (glycated hemoglobin) of 8.2 percent is too high for pregnancy, not as a judgment, but because elevated glucose early in pregnancy significantly increases the risk of miscarriage and congenital malformations.

The general goal before conception is an A1C below 6.5 percent, and ideally closer to 6.0 to 6.2 percent, provided this can be achieved without frequent hypoglycemia (low blood sugar). In day-to-day terms, that usually means aiming for fasting and overnight glucose around 70 to 95 mg/dL and post-meal values below 140 mg/dL at one hour.

The dawn phenomenon (an early-morning rise in blood sugar ) you describe, early morning glucose spikes into the 280 to 300 mg/dL range, is a very common and frustrating problem in type 1 diabetes. It usually reflects increased overnight insulin resistance and counter-regulatory hormones rather than anything she is doing wrong.

Pump adjustments, such as a higher basal rate in the early morning hours, earlier correction boluses, or use of automated insulin delivery features, if available, can help, but it often takes very fine-tuning with close endocrinology support.

Regarding Metformin, it can sometimes be added in selected patients with type 1 diabetes who show signs of insulin resistance, particularly when weight gain, high insulin requirements, or significant dawn phenomenon are present.

Metformin is not a substitute for insulin, but it can help reduce the hepatic glucose output and improve insulin sensitivity, which can flatten the overnight glucose and decrease the total insulin dose. This is an off-label but accepted approach and should be a shared decision with her endo.

Her recurrent UTIs (urinary tract infections) and yeast infections are very likely related to chronic hyperglycemia (high blood sugar) and should improve as glucose control improves. These infections can also interfere with fertility and quality of life, so addressing glucose control is central to multiple issues at once.

From a fertility standpoint, a low AMH (Anti-Müllerian hormone) suggests reduced ovarian reserve, which explains why the fertility specialist is recommending IVF (in vitro fertilization).

However, proceeding with IVF before improving glycemic control would carry significant risks, both for pregnancy outcomes and for her own health. A short period of focused diabetes optimization, sometimes with very frequent contact with the diabetes team, can make a meaningful difference and may allow safer progression to fertility treatment.

This is not about delaying your plans indefinitely. It is about giving your future pregnancy the safest possible start. I would strongly encourage close coordination between her endocrinologist (hormone specialist), fertility specialist, and, when the time comes, a maternal-fetal medicine specialist.

With intensive support, many women in very similar situations do achieve better control and go on to have healthy pregnancies.

You are doing the right thing by asking these questions and advocating for her. This is hard, but it is not hopeless, and you do not have to navigate it alone.

I hope I have answered your question.

Let me know if I can assist you further.

Thank you.