Correction to: Reproductive Biology and Endocrinology (2019) 17:18

https://doi.org/10.1186/s12958-019-0460-4

Following publication of the original article [1], the authors would like to apologize for an error in Fig. 2 describing clinical pregnancy rate comparison between treatment arms. The authors would like to reassure the readers that this minor type error does not affect any other content and the main findings of the article. The correct figure is presented below.

Fig. 2
figure 1

Forest plot of odds ratio for the clinical pregnancy rate in rFSH + rLH versus rFSH alone treatment