Use of Tacrolimus During Pregnancy After Kidney Transplantaion

Motherhood is the greatest privilege that nature gives to women. Although pregnancy is a physiological event for women, every pregnancy is a risky pregnancy. During a normal pregnancy, the health of mother and baby are monitored. In post-transplantation pregnancies, the function of the transplanted organ, along with the mother and the infant, must be monitored, since the continuation of pregnancy depends on both the maternal and infant health and an organ functioning within normal limits. The desire is for every baby to be born in due time and at normal weight, but this is not always possible in pregnancies after transplants. Publications about the pharmocokinetics of tacrolimus are very limited. In this study, we wanted to share our experiences with pregnancy in our clinic.

Patients who used tacrolimus during their pregnancies after renal transplantation (RT) at Antalya Medicapark Organ Transplantation Unit, during November 2008 to July 2018 were included in the study. Patient's gestational age, pregnancy, drug levels, is charge, and labor creatinine clearances were examined.

Four thousand six hundred thirty-five RT occurred between November 2008 to July 2018; 786 of the patients were female between the ages 18 and 45. Thirty-one pregnancies went full term. Twenty-six pregnant women, who used tacrolimus after RT, were included in the study. Five patients had pre-eclampsia, 1 patient had abortus immines, 2 patients had hypertansion due to pregnancy, and 1 patient had aplated placenta. There was a breech presentation in 1 patient with preeclampsia. Acute rejection developed in 3 postpartum patients, but renal values normalized with medical treatment. All the babies were born alive and healthy; postpartum graft loss was not observed.

If planning to become pregnant after RT,our center recommends waiting at least 2 years after the RT, when graft function should be normal and without any signs of HT and proteinuria. Our recommendation regarding the level of tacrolimus after RT is 4.5 to 7 μg.