Pain in the groin due ri the stretching of the round ligaments, the ligaments that support the uterus. As the baby, and uterus, get bigger, they stretch and can can pain- sometimes bad enough that we see people in the emergency room for it. There's nothing that can be done to help it, just take Tylenol.
What is round ligament pain?
Round ligament pain possibly. Nothing can be done about this, sadly.