Full Idea
No one is morally required to make large sacrifices, of health, and other interests and commitments, for nine months, in order to keep another person alive.
Gist of Idea
No one is morally required to make huge sacrifices to keep someone else alive for nine months
Source
Judith (Jarvis) Thomson (A Defense of Abortion [1971], p.135)
Book Reference
'Ethics for Modern Life', ed/tr. Abelson,R./Friquegnon,M [St Martin's 1987], p.135
A Reaction
It is a trade-off. It might become a duty if society (or even a husband) urgently needed the baby.