What is the possible reason for slightly big stomatch after ten(10) days of embryo transfer and occasional cramp ?

OHSS: Assuming you had ivf and a fresh embryo transfer, the most common cause would be ovarian hyperstimulation syndrome. You should speak with your doctor and pay attention to any problems urinating or breathing.

Post ET: The most likely reason for an increased stomach in and ivf cycle is related to the hormones that you have been given, and the high estrogen levels which cause fluid retention. The cramping can be explained by uterine irritability. If you're 10 days post et hopefully you won't get your period in the next week because you're pregnant.