EFFECT OF PREGNANCY AND LACTATION ON PITUITARY PROLACTIN-SECRETING TUMORS

Management of the amenorrhea-galactorrhea syndrome due to pituitary tumor is still controversial. However, in cases of pituitary prolactin-producing adenomas, ovulation and pregnancy are readily induced medically with bromocriptine. In a series of 14 patients, conception occurred in all cases within 6 mo. of treatment. All of the 14 women had uneventful full-term pregnancies and normal infants. Neither neurological nor visual symptoms appeared in these patients during their pregnancies. Lactation had no apparent effect on the growth of the pituitary tumor since radiological and neurological evaluations were unchanged. Prolactin levels for each patient following the termination of pregnancy and breast feeding were apparently diminished or similar to the prolactin levels obtained prior to treatment. This finding could add to the evidence that probably there was no further growth of the pituitary tumor. Three of the 14 women have had a 2nd pregnancy without any complications. It is recommended that patients with microadenomas be allowed to become pregnant on bromocriptine alone, provided that they are carefully supervised during pregnancy.