Well, these days I think the only pressure that is on girls is to have sex before age of consent and ending up with a baby. There are not many ladies left out there who has not had children by the time they are 30, cause majority had them very young or up to the age of 30, so no I don't think there is any pressure to have baby by a certain age cause they all ready have children by that certain age. If you look at this world today you will see baby's having babies.
However, there are those few who like to put career first and whatever age they get to as long as they have fulfilled their dreams they have the baby after, they know they are financially stable to bring a child into this world without the child not have all its needs met.

This biological clock thing was for back in the old days and if there are those few and far between women who have not had children by a certain age, it don't matter anymore. The reason being is that we are looking better for our ages, we are eating better, we can have babies after a certain time its not as riskey as before and if there is any complications we can get help. Remember the 60 yr old mother. There is so much new science going on, or I should say Playing God, going on that anything is possible and there is no need to worry about it anymore, so I don't think people dwell on it.

If you don't have a baby by a certain age people look at you funny, society has a lot to answer for when it comes to dealing with life in general. If your waiting for the right man and he don't come along, what you gonna do, go sperm bank?? Then who you gonna go to for maintance?? How is the child going to know its father?? Society is all wrong, if your blessed with a child concieved naturally,thank the lord, if your not, still thank the lord because these kids these days I would not want one.
Regarding the marriage, what is the percentage rate now that stays married after spening on average 15k on a marriage?? Marriage is not taken seriously these days. Most people would like to get married but from what you see going on around you it puts you off getting married you just end up in debt, hate each other, and that is when the pressure starts.

Well that was my thoughts on your question.