I have been married for a year now. During sexual intercourse, my husband prefers me being on top. I would like to know whether this could have affected my chances of becoming pregnant. Is it necessary that the male partner be on top to ensure conception?

Not at all. As long as ejaculation occurs in the vagina, position is for pleassure not for reproduction purpose .
No. Dear darian this is a great question! one that a lot of people ask. The answer is no - the sperm are very mobile and the good ones will find their way regardless of what position you are in for intercourse. For more details check out this article: http://www.Medfusion.Net/templates/groups/5790/10104/scmisconceptionsabtconceptions.Pdf good luck! serena h. Chen, md.
Pleasure Positions. Conception doesn't depend position as long as ejaculation is deep in vagina. Be sure you communicate your preferences so sex is mutually beneficial.