There is no scientific evidence that eating more grapes by pregnant women will lead to enlarged eyes in their children. The size of a child's eyes is determined by genetics and various factors during development, not by the mother's diet.

However, eating more grapes may have a number of benefits for pregnant women and their babies, such as:

1. High nutrient content. Grapes are a good source of vitamins and minerals, including vitamin C, vitamin K and potassium, which are important for overall health and development.

2. Antioxidant properties. Grapes contain antioxidants such as resveratrol, which help protect the body from oxidative stress and inflammation.

3. Digestive health. Grapes are rich in fiber, which promotes healthy digestion and prevents constipation, a common problem during pregnancy.

4. Hydration. Grapes have high water content, which can help pregnant women stay hydrated and prevent dehydration.

5. Weight control. Grapes are a low-calorie, nutrient-dense food, making them a healthy snack for pregnant women who want to control their weight.

Overall, including grapes in a balanced diet can provide many health benefits to both pregnant women and their babies.