why do regular periods help you conceive
Regular periods help you conceive because, often, ovulation is also regular and functional. Ovulation is when an egg is released into the uterus and, in order to get pregnant, an egg must be fertilized by sperm.
Also, a regular period can indicate a healthy uterine lining. A fertilized egg implants into the uterine wall. Having a healthy uterine lining helps with this process.
Sometimes, you can still have issues ovulating such as ovulating late in your cycle though. You could also have problems like blocked fallopian tubes or endometriosis which make getting pregnant difficult.