Trish

I started on 100iu and got 6 eggs
Next cycle I was on 100iu and got 7 eggs
3rd cycle I was on 100iu and did not respond
4th cycle I was on 200iu and got 10 eggs, of which 4 were immature.

I am 30 kgs overweight and older (by reproductive standards) at 35. I think that this is more a doctor's thing, in that some will weigh the odds and risk a slightly higher dose in the hope of getting a good number of eggs, but other doctors (like mine) are conservative and start with a lose dose and work upwards.

Who knows why they make the decisions they do. I don't think it's weight/age related.

love
sushee