According to results of the clinical trials, about 30% of women with anovulatory dysfunction manage to become pregnant by means of Clomid. Commonly ovulation occurs between the 11th and the 15th days of the menstrual cycle. If during the first 1-2 weeks after the last dose of Clomid The daily dosage of Clomid during the second treatment course should be doubled.

A good read
http://my-clomid.com/?search=clomid