| Defective mitochondria can slow down or prevent the growth of a fertilised egg, preventing conception. |
| The fertilised ovum was then implanted in the womb of the surrogate mother. |
| Most would agree it begins when the fertilised egg implants in the woman's uterus. |
| Parsnips are root vegetables like carrots, but unlike carrots they do not resent being grown in soil that has been recently fertilised. |
| All three of these birth control methods clearly prevent fertilised embryos from implanting in the uterus. |
| The procedure identifies and sorts sperm into two types determining whether a fertilised egg develops into a male or female embryo. |
