When you go for your next gynae appt with your husband, ask the gynae if sex is okay for you both. If gynae gives the green light, that'll be the best assurance for your husband since it's from a expert trusted source.
Tell him that baby is well protected in the amniotic fluid so there's nothing to worry about. Baby won't even feel anything.
Share articles with him. Or, during your monthly check up, ask your OB in his presence 😉
meet your doctor with him.. let him to read some articles
show him article