rape/incest is 1% of abortions.

husband or partner wants her to have abortion 1%

fetal health problems 3%

can't afford baby now 21% [convenient]

unready for responsibility 21% [convenient]

concerned about how having baby would change her life 16% [convenient]

has problems with relationship or wants to avoid single parenthood 12% [convenient]

http://www.johnstonsarchive.net/policy/abortion/abreasons.html