And who exactly is putting this pressure on women? Most men would choose a healthy, fertile woman over a career oriented one. I do think it's women that are taking on the pressure themselves in their quest to have it all.

Many families couldn’t reach their financial goals with only one spouse working.

According to divorce rate, I think it is reasonable to choose "have a career" first. At least, it would be financially independent.

Do you have examples of how this pressure is implemented?

AFAIK it has been shown many times that "career woman" is absolutely not a trait men find attractive.

Well I'm not a woman, so I don't have direct experience. But I think that young girls, for example, are frequently told in school and at home that they can be anything they want, doctors, lawyers, scientists, etc. and that is great, but I think very little is said about being a mother and their biological clock and the tradeoffs that entails, or if it is addressed it is sort of glossed over with a "you can have it all" message.

So girls grow up with a career-oriented mindset, and don't do any careful thinking about what they want, or think about kids/family as something they will do "later" or "when I'm ready" and before they know it they find themselves at 35 years old and unable to get pregnant.