Student wrote:For prostaglandin caverject, it is written in the leaflet that a condom must be used
I think you misread the leaflet: https://www.medicines.org.uk/emc/files/pil.2919.pdf
I just read the Patient Information Leaflet. It says it won't protect you against sexually transmitted diseases and that condoms can. It also says:
Pregnancy and breast-feeding Caverject can be used by couples wishing to conceive and with a partner who is pregnant or breast-feeding. It will not protect your partner from pregnancy, so you should use a reliable contraceptive if appropriate.
Nowhere does it say that a condom must be used at all times and situations.
No, in a monogamous relationship with both partners disease free you don't have to wear a condom. Yes, you can knock-up your girl!
Edit to add: I see I just pretty much duplicated the post by rich.