First of all, you have to be sure that it is something you both want.
Secondly, I think the best time to get pregnant is when the couple has spent enough quality time together doing whatever they have ever thought about doing. Once you have a baby, it is all about the child. You have to have patience and you come last.
In addition, age is a factor for both the man and the woman. A man has more years than a woman. Many women today have children into their 40's but after age 35, there can be health risks.
These are definitely things to think about.
Hope this helped.