The best age to start a family

Exactly when should you start having children? A group of Dutch university researchers has taken 300 years of fertility data to come up with a computer-generated model that might give the best answer.The data sample included 58000 women whose child-bearing histories tell us that if, for example, you want three children without the help of IVF, you will have a 50% chance of doing so if you start at 35.