  For some feminists Thomson's analogy is not appropriate. They reject the perspective of thinking of fetus and mother as distinct persons and emphasize their intertwined relationship. Others worry that the perspective of abortion as a right having to do with ownership and control of one's body would make it difficult to question abortions performed on grounds of sex selection, a practice which is becoming more common around the world in countries where having girls is disfavored; or abortions sought on trivial grounds like the timing of a vacation.