Fertility after transsphenoidal surgery in patients with prolactinomas: A meta-analysis

Pituitary prolactinomas in women often lead to amenorrhea, galactorrhea, or infertility. The purpose of this study was to evaluate the effectiveness of transsphenoidal surgery (TSS) in restoring fertility in women with proloactinomas. A systematic search of the literature was conducted in accordance with PRISMA guidelines through 6/13/2017. PubMed, Embase, and Cochrane databases were utilized to select studies reporting on patients with pituitary prolactinomas removed via TSS. Outcomes extracted included pre- and post-operative rates of menses, lactation, and fertility. Pooled effect estimates were calculated using random-effects. After removal of duplicates, 900 articles remained, of which 14 were meta-analyzed. The mean difference between pre- and post-operative prolactin level was 186.9 (95% CI = 133.7, 240.1; I² = 69.9%; P-heterogeneity<0.01; 7 studies). The pooled prevalence of pre-operative amenorrhea was 96% (95% CI = 92%, 98%; I² = 45.8%; P-heterogeneity = 0.09; 11 studies) and significantly larger than post-operative amenorrhea of 40% (95% CI = 27%, 55%; P- I² = 85%; heterogeneity<0.01; 11 studies); (P-interaction comparing the 2 groups <0.01). The pooled prevalence of pre-operative galactorrhea was 84% (95% CI = 74%, 90%; I² = 66.9%; P-heterogeneity<0.01; 10 studies) and significantly larger than post-operative galactorrhea of 29% (95% CI = 17%, 44%; I² = 76.5%; P-heterogeneity<0.01; 7 studies) (P-interaction<0.01). Univariate meta-regression on age, continent, publication year, study design, quality, duration, or timing revealed these covariates were not effect modifiers for any of the 3 outcomes (all P > 0.05). No evidence of publication bias was seen using Begg's and Egger's tests (all P > 0.05). Transsphenoidal surgery appeared to improve fertility measures in women with pituitary prolactinomas.