X-Factor #39 executes exactly that. I don’t want to give this one away—really, if you haven’t already, you need to read Peter David’s phenomenal X-Factor run (both of them, actually). The series that began in 2005, which focuses on Jamie Madrox the Multiple Man leading a terrific ensemble cast, is the greatest X-Men spinoff series I’ve ever read. And I have read many.
I’ll give away the basic setup, though. A while earlier, Madrox had a one-night stand with two women at the same time (his power is he duplicates himself, so he can literally be at two places at once). One of those women got pregnant. Issue #39 is the delivery. And in comic books, childbirth is seldom without complications.
David foreshadows the ending superbly, and yet it still blew me away. Absolutely fantastic storytelling.
Writer: Peter David
Penciler: Valentine De Landro
Inker: Craig Yeung
Publisher: Marvel Comics
How to Read It: back issues; Marvel Unlimited; Comixology; included in X-Factor vol. 7: Time and a Half (TPB)
Appropriate For: ages 13 and up