write it with easier words but keep it professional: Contracts that impose restrictions on the timing of childbirth can also be viewed as contrary to public policy, especially when they interfere with personal decisions related to family life. Courts often find such restrictions to be unenforceable because they violate fundamental personal rights. Joan likely has a defense to this suit. The restriction on having children before a certain age is likely unenforceable as it infringes on Joan's personal rights and is contrary to public policy