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Randomized Controlled Trial
. 2020 Jul;114(1):155-162.
doi: 10.1016/j.fertnstert.2020.03.022. Epub 2020 Jun 16.

Tubal flushing with oil-based or water-based contrast at hysterosalpingography for infertility: long-term reproductive outcomes of a randomized trial

Joukje van Rijswijk  1 , Nienke van Welie  2 , Kim Dreyer  2 , Clarabelle T Pham  3 , Harold R Verhoeve  4 , Annemieke Hoek  5 , Jan Peter de Bruin  6 , Annemiek W Nap  7 , Machiel H A van Hooff  8 , Mariëtte Goddijn  9 , Angelo B Hooker  10 , Petra Bourdrez  11 , Angelique J C M van Dongen  12 , Ilse A J van Rooij  13 , Henrike G M van Rijnsaardt-Lukassen  14 , Ron J T van Golde  15 , Cathelijne F van Heteren  16 , Marie J Pelinck  17 , Annette E J Duijn  18 , Mesrure Kaplan  19 , Cornelis B Lambalk  2 , Velja Mijatovic  2 , Ben W J Mol  20
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Free article
Randomized Controlled Trial

Tubal flushing with oil-based or water-based contrast at hysterosalpingography for infertility: long-term reproductive outcomes of a randomized trial

Joukje van Rijswijk et al. Fertil Steril. 2020 Jul.
Free article

Abstract

Objective: To determine the impact of oil-based versus water-based contrast on pregnancy and live birth rates ≤5 years after hysterosalpingography (HSG) in infertile women.

Design: A 5-year follow-up study of a multicenter randomized trial.

Setting: Hospitals.

Patient(s): Infertile women with an ovulatory cycle, 18-39 years of age, and having a low risk of tubal pathology.

Intervention(s): Use of oil-based versus water-based contrast during HSG.

Main outcome measure(s): Ongoing pregnancy, live births, time to ongoing pregnancy, second ongoing pregnancy.

Result(s): A total of 1,119 women were randomly assigned to HSG with oil-based contrast (n = 557) or water-based contrast (n = 562). After 5 years, 444 of 555 women in the oil group (80.0%) and 419 of 559 women in the water group (75.0%) had an ongoing pregnancy (relative risk [RR] 1.07; 95% confidence interval [CI] 1.00-1.14), and 415 of 555 women in the oil group (74.8%) and 376 of 559 women in the water group (67.3%) had live births (RR 1.11; 95% CI 1.03-1.20). In the oil group, 228 pregnancies (41.1%) were conceived naturally versus 194 (34.7%) pregnancies in the water group (RR 1.18; 95% CI 1.02-1.38). The time to ongoing pregnancy was significantly shorter in the oil group versus the water group (10.0 vs. 13.7 months; hazard ratio, 1.25; 95% CI 1.09-1.43). No difference was found in the occurrence of a second ongoing pregnancy.

Conclusion(s): During a 5-year time frame, ongoing pregnancy and live birth rates are higher after tubal flushing with oil-based contrast during HSG compared with water-based contrast. More pregnancies are naturally conceived and time to ongoing pregnancy is shorter after HSG with oil-based contrast.

Clinical trial registration number: Netherlands Trial Register (NTR) 3270 and NTR6577(www.trialregister.nl).

Keywords: Female infertility; hysterosalpingography; oil-based contrast medium; ongoing pregnancy; water-based contrast medium.

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