Further according to the present disclosure, there are methods for promoting egg maturation in assisted reproductive technologies, such as in in vitro fertilization (IVF) or in an embryo transfer (ET) process. There are also methods for decreasing the rate of ovarian hyperstimulation syndrome (OHSS), providing comparable or improved pregnancy rates, decreasing the time to pregnancy, and inhibiting premature ovulation. The methods include the step of administering a therapeutically effective amount of an active pharmaceutical ingredient of 2-(N-acetyl-D-tyrosyl-trans-4-hydroxy-L-prolyl-L-asparaginyl-L-threonyl-L-phenylalanyl) hydrazinocarbonyl-L-leucyl-Nω-methyl-L-arginyl-L-tryptophanamide or a pharmaceutically acceptable salt thereof.