How old was Queen Elizabeth when she had her last child?

Related questions

1. Do we get time off if the queen dies?
2. Will Camilla ever become queen?
3. Why is Prince Philip not the King?
4. Can there ever be a king of England?
5. Who raised Anne Boleyn's daughter Elizabeth?
6. Will Camilla ever be called Queen?
7. Is a Lady higher than a dame?
8. Who is older Prince Charles or Princess Anne?
9. What did Princess Margaret die off?
10. What happens if Charles dies before the Queen?

Tags

1. #daughter
2. #prince
3. #charles
4. #since
5. #coming
6. #before
7. #years
8. #after
9. #andrew
10. #throne
11. #third
12. #princess
13. #reigned
14. #queen