can taking L-arginine help to make you pregnant?

Answer 1

Supplementation with the amino acid, L-arginine (16 grams per day), has been shown to improve fertilization rates in women with a previous history of failed attempts at in vitro (test tube) fertilization.22
http://www.gianteagle.com/healthnotes/Supp/Arginine.htm
http://www.gianteagle.com/healthnotes/Concern/Infertility_Female.htm

Alsop consider taking a multi-vitamin with iron