Transcript for Single mothers by choice: 'I am the CEO of my own operation'
Reporter: This is the moment Deirdre hopes will turn her dreams into a reality. I have waited my whole life, and I'm starting to get really nervous. We can see the air bubbles. Reporter: She's undergoing ivf. In-vitro fertilization to become a mom. But this isn't exactly how Deirdre thought her journey to motherhood would begin. Wonderful. Oh, my gosh. Good luck. Look at this. That's amazing. Beautiful. Reporter: It will still be several days before she finds out if the procedure was successful. So ten days, ten days is going to be a long time. Reporter: She's hoping to join a long line of women doing it all on their own, becoming single mothers by choice. You woke up at 42 and suddenly the dream of motherhood had slipped through your fingers. Yeah. Reporter: How did that happen? Being a single mother by choice I've met a lot of women that have the same story. So for me it was I believed that it would be there. And I thought I'll find the guy. We'll have the white picket fence. It's there. But right now I'm on my career path and unfortunately, it was like, wow, life fast forward, now I'm 42. Is it even a possibility? Reporter: Deirdre spent her 20s and 30s climbing the corporate ladder, but the marketing exec said she also had ambitions to become a mother. My mother is the reason for that. Reporter: How did she react when you said mom, I'm going to be a single mom by choice. I remember hearing a long pause on the phone, and I'm like oh, she doesn't buy in. She's upset about this. And then I heard a gasp and she started to cry. And she's like this is the thing I wanted for you more than anything in life. And at that moment it all started. Reporter: Did people try to dissuade you? Oh, yeah, I had a couple people. A person I had worked with in a previous life, and he said are you doing the right thing for the child by having a child on your own? And I was like, what do you mean by that? Reporter: What did you say? This child is going to be loved more than any child in the world, full stop. Reporter: Why not? I wanted to have that experience. Reporter: Her eggs were less viable because of her age, so she quickly made the hard decision to use donor eggs instead. There was a moment where I was sad, but I was 42. So I had to be realistic. And at the end of the day, it was just about having a baby. Reporter: Let's talk about the financial burden. Thank goodness, you had the means, but this is cost prohibitive for a lot of people. Here's where my career actually worked in my favor. I was able to afford pretty much everything because I had worked so hard. I had set aside funds. So when they had said this is going to be about $15,000, I was lucky enough to be able to proceed with that. Reporter: And you called it the best investment of your life. Yeah, can you buy a house, you can buy a car, you can buy stuff. I was able to drive my dream and invest in a human being. Reporter: Ten days after her ivf procedure, Deirdre gets the phone call she's been wait being for. Congratulations, you are pregnant. I felt like a unicorn. You have made my life. This is so surreal. Reporter: Deirdre is overjoyed. That is crazy. Reporter: But she's keenly aware of what it means to be doing this alone. There is a courage component, and I think that's what makes some women think they can't do it. Can I do it on my own? I'm one-person band if you will. Reporter: There's no sleeping in while your spouse takes care of the baby. Right. I like to call it being CEO of my own operation. I get to call the shots. Hi, I'm Deirdre, are you Sara? Thank you so much for doing this. This is my single moms by choice we get together on a monthly basis. And it's a support group as well as information group. Reporter: While medical breakthroughs may have made it easier to become a mother by choice, one of these is Jane maddis. You can't parent alone. You really need a support could be friends, relatives, other single mothers by choice. Reporter: Jane founded a group by that same name in 1981, from this living room when her son Eric was just 1. When we first started, we got a lot of push back, particularly from men's organizations in terms of how dangerous and terrible it would be for the children. And that turned out not to be true. Reporter: When Eric was a teenager, he and Jane were actually interviewed by ABC news about their unique family. Was there ever anytime or has there been anytime when you wish hundred a dad? No, not really. Reporter: Today Eric is 38 years old. Married and proud of his mother. I experienced a female role model who did it all. She had the job. She brought in the money. And she raised me. Reporter: While he cherishes some aspects of being raised by a single mom, he also talks frankly about the challenges. I missed out on potentially having a little more experience with social skills, things that I would have picked up on from watching two parents interact. But at the same time, I don't think it's fair to draw conclusions from that, because there's a lot of two-parent households that are dysfunctional. I tell lily that we have a special family. That I wanted her more than anything in the whole wide world. Reporter: Kayla is still in the thick of single parenting a young child. Her daughter lily is 8 years old. One mom is enough. One dad. As long as you have love, right, sweetie? Mm-hm. I didn't delay having a child for a career, I just never met the right guy. I didn't want to settle for somebody who wasn't the right person. Reporter: Kay was 39 when she gave birth to lily. I think families have a different definition now. There are two dads, two moms, one mom, one dad. Reporter: But Kay was surprised when she learned that New Jersey law didn't define family the way she did. At one point, she was denied coverage for her fertility treatments. New Jersey fertility law as it existed said a man and a woman have to be trying for a year in order to get coverage. So that excluded single women, and it excluded gay women. Reporter: So she took her fight to the state house and worked with her representatives to update the law. Kay's family is about to grow once again. Soon we're going to have a third person in the house. And he's a really funny guy. When I least expected it, the right guy showed up. The decision to be a single mom by choice doesn't mean you're going to be single forever. It means you have the ability to wait for the right guy. Who's belly is this? Reporter: As for Deirdre, she's now a mother to 6 month old Kelsey. The name actually means "Brave". Reporter: How do you plan to tell Kelsey about mom, where die come from? Where's dad? Yeah, I think the number one thing is being open and honest. Mommy wanted you in her life, but the thing is, she needed help from other people. I want her to be proud of how she was created and brought into this universe. For never before in story or rhyme, not even once upon a time has the world ever known a you, my friend. Reporter: What a lucky girl she is. I'm the lucky one. I'm totally the lucky one.
This transcript has been automatically generated and may not be 100% accurate.