Secondery infertility

Patient: Iam 30 years old,ihave agirl( 4 years old) ,i want to be pregnant again, i try to be get pregnant all over the last two years ,all my lab is normal and my hestrosalpengography was also normal ,follicullometry along all past 10 month showed sucessful ovulation but s.progestrone( 7 days after ovulation) level always was around 5( wich indecate poor ovulation what is the cause and what is treatment choise for this condtion