quote from this site
http://www.on-the-matrix.com/africa/lions_mating.asp
When it's time to make little lions, the dominant male and a female in heat leave the pride for a few days and devote themselves to mating and sleeping. They will mate every 15-30 minutes for several days in a row. The rest of the time they will sleep, passing up all but the most easily obtained food.
end quote
There's another picture sequence here
http://www.birdingafrica.net/page153.html