Related Experiment Video
Updated: Feb 11, 2026

Surgical Techniques to Optimize Ovarian Reserve during Laparoscopic Cystectomy for Ovarian Endometrioma
Published on: January 22, 2022
When Performing vNOTES Salpingectomy, Are We Damaging the Ovarian Reserve? Results From a Randomized, Controlled
Elif Yildiz1, Enes Serhat Coşkun1, Gözde Yildirim Timur1
1Department of Obstetrics and Gynecology, Gaziosmanpaşa Training and Research Hospital, University of Health Sciences, Istanbul, Turkiye (all authors).
Study Objective:
To compare the effects of transvaginal natural orifice transluminal endoscopic surgery (vNOTES) and conventional laparoscopy (CL) on ovarian reserve in women undergoing opportunistic bilateral salpingectomy (BS) for permanent sterilization.
Design:
Prospective randomized controlled trial.
Setting:
Tertiary care university hospital.
Patients:
Eighty-one women seeking permanent surgical sterilization were included; 35 underwent vNOTES salpingectomy and 46 underwent laparoscopic salpingectomy.
Interventions:
All participants underwent BS using either the vNOTES approach or conventional laparoscopy.
Measurements And Main Results:
Ovarian reserve was assessed using serum anti-Müllerian hormone (AMH) levels and antral follicle count (AFC) measured preoperatively and at 3 months postoperatively. The 2 groups were comparable in terms of demographic characteristics. No statistically significant differences were observed between the vNOTES and CL groups regarding preoperative or postoperative 3-month AMH levels (p > .05), and repeated-measures ANOVA revealed no significant time × group interaction (p = .222). AFC values were also comparable between groups. Postoperative pain scores at 6 hours were significantly lower in the vNOTES group compared with the CL group (p < .001).
Conclusion:
vNOTES salpingectomy did not adversely affect ovarian reserve at 3 months compared with conventional laparoscopy, as assessed by AMH and AFC. Early postoperative pain scores were lower in the vNOTES group; however, pain was a secondary outcome. Larger studies with longer follow-up are warranted.
Clinicaltrials:
GOV: NCT07177144, Date: 15/06/2025.
Related Concept Videos
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Trial and Error and Algorithm
Clinical Trials: Overview
Clinical Trials
There are four phases in a clinical trial. A phase one...
Random Error
Random Variables
Uppercase letters such as X or Y denote a random variable. Lowercase letters like x or y denote the value of a random variable. If X is a random variable, then X is written in words, and x is given as a number.
For example, let X = the...

