PLOD1 and Infertility: The standard investigation of an infertile couple includes the semen analysis to detect male factor infertility, the hysterosalpingogram (HSG) in order to evaluate the patency of the fallopian tubes, and the assessment of the ovulatory function via evaluating follicle-stimulating hormone’s (FSH) levels, luteinizing hormone’s (LH) levels, estradiol’s levels, and progesterone’s levels during the menstrual cycle.