Some experiments have shown results that point to the strengthening of the uterine muscles due to consumption of dates. This is beneficial particularly in the last months of pregnancy. As well it is said dates can help dilation at the time of delivery. It should also be mentioned that research has found a link between dates and a reduction of bleeding postpartum.
With this information it is concluded that dates are a real benefit to women in pregnancy and those who are breast-feeding.
Dates are believed to contain elements that assist in alleviating depression in mothers and enriching the breast-milk with elements needed to make the child healthy and resistant to disease
Unless specified by your doctor, it is absolutely safe (even healthy) to eat dates during pregnancy.
Just remember the key is to not each too much of any food. A high consumption of fruits means a high consumption of sugar. Balance your diet to ensure that it is constituted of at least 2 portions of fruits per day, 5 portions of vegetables, lean meats, non-fat dairy products and whole grains.