I took my D to the ob/gyn and she started taking bc pills senior year of HS as she was having debilitating cramps (the pills helped tremendously). I never got involved in either kids sex lives other than to mention if they are active and single that they should be using protection (and enjoy watch them cringe as I say it LOL).
In terms of meeting the SO’s parents both in college and beyond we have left it to the kids to organize any meeting. We did meet my D’s college bf’s parents a couple of times briefly (they were lovely) and we met her (now) husband’s parents during a brunch the kids set up when things started to look serious (also very lovely people).