Ross would have a mixture of emotions. He still has feelings for Rachel, so it would be tough for him, but he'd also want to be there for his friends. Phoebe would be over the moon and would probably start knitting baby clothes right away. Chandler would find the whole situation hilarious and would constantly tease Joey about impending fatherhood. Monica would be the most helpful, giving Rachel advice on pregnancy and making sure Joey is prepared for the responsibilities of being a dad.
Ross would probably be really shocked and a bit jealous at first. He might have a hard time accepting it. Phoebe would be super excited and would probably offer to be like a spiritual guide for the baby. Chandler would make a lot of jokes about it, but deep down he'd be happy for them. Monica would be practical and start planning things like baby showers and making sure Rachel has all the right things for the pregnancy.
Their friends could have a wide range of reactions. Some might be overjoyed and offer lots of support, like bringing over baby clothes and offering to babysit in the future. Others might be a bit more skeptical, especially if Blaine and Rachel's relationship has been a bit rocky before. They could worry that the couple isn't ready for this big step.
Some friends might be shocked at first. Kurt could be overly dramatic, worrying about how this will change everything. Finn might be a bit jealous or concerned for Rachel. Quinn could have a complex reaction, since she has her own history with Puck. But overall, most of their friends would probably come around and offer support, like helping with baby preparations or just being there to listen.
Some of her friends might be overjoyed and immediately start planning baby showers and buying cute baby gifts.
Well, Serena would probably be over the moon. She's always been close to both Dan and Blair and would see this as a wonderful union. She'd be there for Blair during the pregnancy, helping her with shopping for baby clothes and giving her advice. Nate, on the other hand, would be more practical. He'd offer to help Dan with any financial or housing arrangements they need to make for the baby. And then there are the more catty friends, like Penelope and Hazel, who might be jealous and make snide remarks about how Dan and Blair got pregnant so quickly, but deep down they're just envious of their relationship.
Their friends might be initially shocked. Some of their more cautious friends could be worried about the implications of a child born to such powerful individuals. However, their closest friends would likely be very supportive and offer help in any way they can, like providing a safe place to stay or resources for the upcoming baby.
Some friends might be overjoyed. For instance, Stiles could be really excited and start making all kinds of plans for the baby shower. He might also be a bit overprotective, constantly checking in on Lydia and making sure she's taking care of herself.
One possible fanfiction idea could be that Joey and Phoebe find out they're pregnant around the same time. They could then support each other through the pregnancy journey. Maybe they have crazy cravings together and compare notes on how they're feeling. Joey might be really excited to be a dad and start practicing his dad jokes early. Phoebe could be more laid - back about it, thinking it's just another part of life's beautiful chaos.
A fanfiction might explore how Rachel's pregnant belly affects her relationship with Ross. They could have tender moments where Ross gently touches her belly and talks to the unborn baby. There could also be some tension as they discuss things like baby names and future living arrangements, all while Rachel's pregnant belly is a constant reminder of the big changes coming in their lives.
There are many fanfictions out there. However, it's important to note that in the official 'Friends' series, their relationship was more of a complex friendship. But in fanfiction, some might explore how their relationship could have developed romantically and led to such an intimate moment. You can find these on various fanfiction websites by using relevant keywords in the search bar.
Definitely Ross. Given their past, it would be a natural progression in a fanfiction. But don't rule out a random encounter. What if Rachel had a one - night stand with a famous fashion photographer? That would bring a whole new level of scandal and drama to the story. And then there's always the possibility of it being an old acquaintance from high school who re - enters her life just at the wrong or right time, depending on how you look at it, and ends up being the father.