Can the lower abdomen have a temperature in early pregnancy?

Yes, it is normal for the basal body temperature to elevate during the luteal phase of the menstrual cycle, which is the time between ovulation and the start of menstrual bleeding. This temperature increase is attributed to the presence of progesterone, a hormone that is produced by the corpus luteum and plays a crucial role in preparing the uterus for implantation of a fertilized egg.