Evolution of suitable age to be pregnant

Do you still remember the time when women gets married between 14-19 and that 20 years old is considered too old to get married? Now reflect on the society these days where 14 is under aged, 19 is also too early and until 60 years old it's still not too old to get married. How times have change people's mindset. In modern days like today, women prefer work and higher education, marriage comes second. Some don't even care.

But i also realized more and more girls are getting pregnant and married at a young age of 17-19. It might still appear normal but to me i find it rather confusing.
I have few friends who once studied with me in college or high school and had to quit halfway cuz they were knocked up. They gave birth, married and never continued their education. I wonder if they even felt remorse or regrets about that. Maybe they like starting a family and be a home maker that depends on the husbands to provide them allowance. I rest my case then.
But what if they do feel regrets after having the baby? Many of these girls feel inferior to the husbands superiority of earning money, having a career and social life while they just gets stuck with the neighbours and mommy's club because they're friends are too busy studying and preparing for their own career. How will they feel that time? Will they feel that they should have controlled themselves and finish college, getting married before having a baby?
I mean fine! You have the teenage hormones urge to do it (have sex) but c'mon, protections are already available since long ago. Utilize it! Don't regret when you already found out it's too late and resort to baby dumping and abortion which i think it's just immoral and irresponsible. You put yourself into that situation, take full responsibility for your actions. Now that's out of the topic.
Being young but tied to responsibility as a mother is rather torturing. You are at the prime time of your life but you have to be stuck with a wailing baby the entire time. You see your friends having a wonderful time being single, carefree and a career. All just because you neglect to think of the consequences of unprotected sex. I'm just saying~~
I see friends and acquaintance making this mistake. My own mother went to college after she had me and my sister, leaving us with my grandmother and father. She later regrets it cuz she wasn't there for me during the crucial moments of my life. I never blamed her but she blames herself for not being able to guide me into a straight A student.