Yes it is very unusual to know that a cough syrup like the Robitussin could have something to do with fertility.

To reiterate what I said before, Robitussin whose main ingredient is guaifenesin aids in fertility because it improves the quality of your cervical mucus. Fertile cervical mucus helps transport sperm from the vagina into the uterus. Sperm cannot survive long without fertile cervical mucus.

there are some ingredients that can harm our body but there are also children a product of a woman who she crave for chocolate.

it is known that taking a cough syrup can make a person addict to it. I don't think so if taking this cough syrup may affect fertility.

it is new to my knowledge, a cough syrup can help in improving infertility. We will make a research about this matter, but still I am not convinced.

I'll let my friend know about this. She has problem in getting pregnant for 3 years already. Though I am not that sure if it really work but the couple were so desperate to have a baby and they have try lots of ways to improve fertility.