After 16 years of IVF and 18 miscarriages Louise Warneford is now mum to William and has written a book about her heartbreaking journey.
The new guidelines - brought into force because of coronavirus disruption - also apply to frozen sperm and embryos.
The singer suffers from a condition called endometriosis, which affects approximately 10% of women worldwide.
Men who drank alcohol three months before conception had a 44% raised risk of the baby being born with congenital heart disease.
"For everyone going through infertility and conception hell, please know it was not a straight line to either of my pregnancies."