i don't know any characters names ,but it starts off with a bereaved husband who thinks he can hear his dead wife calling to him from her grave . a female reporter investigates and discovers that the doctor was experimenting on people with a paralysing drug ,when they exhumed the wife after several weeks,who was almost full term with her pregnancy,she had been buried alive and given birth in her coffin
Ooh, sounds intriguing... Sadly I can't help you but I thought I'd mention a place where you might have more luck - if you register at abebooks.co.uk (or try http://forums.abebooks.com/abesleuthcom)
the booksleuth forum might provide the answer. They've done wonders in the past, and with less details than you've remembered! I hope this helps a little bit!