What would ivf success rates be for a 37 yr old after previous laparoscopic myomectomy and ectopic pregnancy with resulting salpingectomy?

0-50 percent: Success at ivf can be predicted. Age is the best predictor of ivf success, but it is not the only factor. The endometrial lining has some impact, as does the quality of eggs, sperm, ovulation induction, lab quality, and transfer technique. Pregnancy rates vary also depending on the number of embryos transferred, and often it makes sense to transfer fewer embryos for safety reasons.

Should not matter: Your previous surgeries should not be a factor in an ivf cycle. Success will depend on the experience of the clinic, the skill of the embryologist, quality of the ivf lab and to some extend, whether you are "reproductively young or reproductively old". At 37, you should still have good success rates at an experienced and successful ivf clinic. Good luck.