Google SEO Position is everything. But in this case, nothing beats the traditional missionary position, as it maximizes chance is of that vital contact between sperm and egg. The woman should stay lying on her back for 20 minutes after intercourse with hips slightly raised by pillow.
What function with on: Only quote reliable sources. (Wikipedia and sites that host student essays are not reputable). Only quote as soon as the author says something much better than you can tell it inside your own words, or if it directly supports what you're saying, or when the author is this type of famous expert that it'll look like he's in your favor. Don't pretend to quote aspects that are within your own things. Don't say 'someone' or 'wise men' or 'scholars' to summarize common knowledge