People of mediocre ability sometimes achieve outstanding success because they don't know when to quit. Most men succeed because they are determined to.
It's hard for children's authors to be accepted when they try to write adult books. J.K. Rowling is the exception because people are so eager to read anything by her but it took Judy Blume three or four tries before she had a success.
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Women face enough pressures and challenges in a workplace that is still depressingly biased against a female's success. Add to that the fact that the very thing many women I know find most rewarding (having kids) is now frowned upon.