Pregnancy after ablation is unlikely and not recommended. However, it can happen. Women who have had an endometrial ablation (a.k.a. uterine ablation) should use contraception until after menopause. While it may be possible to get pregnant after this procedure, pregnancy after endometrial ablation can be complicated, so you should not get sterilized unless you are sure you do not want (more) kids. Sterilization may be a good option if you have had an endometrial ablation to make sure you never have to worry about an unplanned pregnancy.
References:
- World Health Organization Department of Reproductive Health and Research and Johns Hopkins Bloomberg School of Public Health Center for Communication Programs (2018) Family Planning: A Global Handbook for Providers. Baltimore and Geneva. Retrieved from https://apps.who.int/iris/bitstream/handle/10665/260156/9780999203705-eng.pdf?sequence=1