Jun 5, - A British survey that found that roughly 1 in 10 women experiences pain during sex. In particular, many women experience cramping or abdominal pain during or after sex, and so Allure spoke with doctors to about what causes it — and what to do about it. Apr 14, - Reaching an orgasm is a pleasurable moment but it also causes uterine contractions, which can lead to stomach ache post-sex. Another reason responsible for this is being in the period of ovulation. Deep penetration can cause pain if there is fluid in the pelvic area, which can be caused due to the release of the egg.