It does if you're a woman who wants to have children. There are of course expensive ways to increase fertility after it has started to decline, but they're far from a guarantee.
The point, though, is that if a woman is still just looking for a husband at 25, when she is already nearing the end of her peak fertile years, she will likely be at the end of her peak fertile years when she gets married, so it's all downhill from the get-go.
The point, though, is that if a woman is still just looking for a husband at 25, when she is already nearing the end of her peak fertile years, she will likely be at the end of her peak fertile years when she gets married, so it's all downhill from the get-go.