Prenatal screening labs (blood type, rubella immunity, RPR, HbsAg, hepatitis C, HIV, hemoglobin level, and cystic fibrosis screening) are recommended to be drawn on all women who are planning to conceive. In addition, women who are at risk to transmit certain genetic disorders based on their ethnicity may be recommended to have additional screening blood tests drawn. Cervical cultures for chlamydia and gonorrhea may be obtained at the first office visit. All patients must have their pap smear up-to-date before initiating fertility treatments.
Progesterone is a hormone that only appears in the blood after ovulation. The level of progesterone present depends upon the length of time that has occurred since ovulation and the quality of ovulation. Blood is drawn 7-9 days after the LH surge. Usually, this means around day 20-21 of the menstrual cycle. If you received hCG, your progesterone level will be drawn 7-9 days after the hCG is given.
Thyroid and Prolactin Levels
Disorders involving the thyroid gland as well as elevated production of prolactin hormone are more common in women than in men. Abnormal production of these hormones can affect ovulation as well as the menstrual cycle. The most sensitive test of thyroid function is the TSH which can be drawn at any time of the cycle. A screening prolactin level is usually obtained at the same time. If an abnormality in the prolactin is detected, a repeat blood draw will be performed preferably fasting during the first half of the menstrual cycle before ovulation occurs.