Growing population
Given the increasing use of IVF in recent years, Dr. Thwaites said the importance of understanding and meeting the contraceptive needs of women post-IVF is increasingly important. Also, people are turning to it earlier and for other reasons, such as women in same sex relationships, single women, pre-implantation genetic testing, and surrogates.
“During the recruitment process for the current study, I came across women who said since their IVF pregnancies they had no idea what they should do about contraception,” Dr. Thwaites said.
But she empathizes with health care professionals too. “I genuinely feel that health care professionals just don’t know how to advise women in this setting, so they avoid the topic of contraception altogether with these women. They are concerned about making women feel awkward or upsetting them. In my experience, there is very little said about IVF and contraception in the same breath.”
Women believe subfertility always persists after IVF
Among participants in the study, the causes of the women’s subfertility were wide-ranging and included tubal, anovulatory, male factor, joint, and unexplained, the latter of which affects 25% of couples with fertility issues. In the cohort, women had taken up to 9 years to conceive their first child and one had a donor egg conception.
After IVF, the chance of pregnancy will depend on the reason for the couple’s subfertility. “Given that a huge number of patients these days have unexplained subfertility. This is when there is no absolute cause of infertility identified, and it might not prevent a pregnancy but slows it down,” Dr. Davies said in an interview. “Such couples still have a chance of natural pregnancy.”
Polycystic ovary syndrome as a cause of subfertility is often associated with improvement in fertility after IVF, Dr. Davies noted. “This can improve after a spontaneous pregnancy or after IVF, even if the IVF is not a success, and this is possibly due to needling the ovary.”
Dr. Thwaites added that challenging women’s perceptions of their subfertility is critical if headway is to be made on this topic. Many women have persistent views concerning their subfertility after successful IVF, which may be rooted in previous failed treatment; need for repeat cycles or intracytoplasmic sperm injection (ICSI); low numbers of eggs collected; poor quality embryos; and pregnancy complications, to note some of the most common reasons.
“So many [women] feel that they are very lucky to have had a pregnancy because their journey has been difficult. They might have had a successful pregnancy, but they still hold a sense of personal failure,” said Dr. Thwaites. “Even after spontaneous pregnancy some women said it was a miracle or freak event. [Yet two of these] women had two spontaneous pregnancies.”
Remarkably, even after subsequent spontaneous pregnancy, use of contraception and the most effective methods remained low among participants.
As well as fixed beliefs concerning their subfertility, other barriers to contraception use included a lack of knowledge of likelihood of spontaneous pregnancy; lack of contraceptive experience; and inherent incentives towards shorter interpregnancy intervals (e.g., the convenience and privacy of undergoing further IVF while still on maternity leave and availability of frozen embryos).
Looking ahead, Dr. Thwaites says there is a clear need to link and/or expand the maternity services dataset to uncover the true rates of post-IVF spontaneous pregnancy.
Dr. Thwaites and Dr. Davies have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.