Vitex would be a better choice, though Maca may help as well.
Vitex is a very intelligent plant. This herb balances hormones and lengthens cycle without actually containing hormones or phytoestrogens. Vitex’s main action is on the hypothalamus and pituitary.*
In women, maca works by controlling estrogen in the body. Estrogen levels that are high or low at the wrong time can keep a woman from becoming pregnant or keep her from carrying to term. Excess estrogen levels also cause progesterone levels to become too low. Taking maca may help to increase the progesterone levels which are essential to carrying a healthy pregnancy.**
*
http://natural-fertility-info.com/vi...ree-berry.html
**
http://natural-fertility-info.com/maca