How realistic your approach is depends on many aspects. Your excuses of having a kid at an older age may not be reasonable.
Here is a list of 5 excuses of married as well as single people who delay having children.
1. I should concentrate on my career before I start to worry about fertility
Female fertility peaks in women’s 20s. In the late 20s it starts to decrease. When a woman is 31, her fertility is lowered by 3% a year. The process lasts for another 4 years. Then it starts to dip faster. On average, a 39-year-old woman is 50% less fertile than she was at 31. More than that, most women who wish to get pregnant after they turn 39 usually face trouble. As a rule, women can have a child until 41. We are not trying to say that working ladies should quit their career and change their life instantly. However, you should always be aware of the real situation in order to be able to make the right decision. Some might want to freeze their eggs and have a baby after they are satisfied with their career.