Hmm, that seems weird that your dr would say that. Maybe he/she meant that it wasn't a definite that you would have ovulated early enough to get bloodwork done cd21? The bloodwork checks your progesterone level, which can indicate if you ovulated, and if your ovulation was "strong enough", going by the numbers. But, with that said, not all dr's do that, mine isn't. She gave me 3 refills and wanted to see me back in February to see how it was going. Maybe since your dr is doing ultrasounds he thinks that bloodwork isn't necessary too??