Three days after welcoming her third child, a baby girl, with her husband, Kanye West, Kim Kardashian wrote an emotional essay on her website and app about her decision to use a surrogate and her issues with conceiving.

The essay, titled “The Truth About My Pregnancy Decision,” delved into the 37-year-old mom of three’s struggle with preeclampsia and placenta accreta, two health conditions that affect her ability to carry a child. But it also nodded to a much talked-about rumor about her family: that her sister, Kylie Jenner, was her surrogate.

Rumors heightened that Kylie was Kim’s surrogate when she was reportedly spotted in labor at Cedar-Sinai Medical Center in Los Angeles a day before Kim’s baby was born. Given the rabid speculation, fans have eagerly awaited for Kim to confirm or deny the rumors in some way, and they might’ve received their answer.

In her essay, Kim makes it a point to clarify that she didn’t use a “traditional surrogate,” a woman—who can often be a family member (i.e. a sister) who donates her egg to be artificially inseminated by the father’s sperm. Instead, Kim prefers the term “gestational carrier,” which means that the woman who carried her child has “no biological relationship” to her and that her child’s D.N.A. is 100-percent hers and Kanye’s. Given that Kim made it clear that her carrier wasn’t biologically related to her in any way, she essentially shot down rumors that Kylie was her surrogate.

“Although I have used the term surrogate in the past, a gestational carrier is actually the technical term for a woman who carries a baby that she has no biological relationship to,” Kim wrote. “Since we implanted my fertilized egg in our gestational carrier, our baby is biologically mine and Kanye’s.”

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Kim debunked the rumors again when she explained the “thorough” process she went through to choose a carrier. She confirmed that she found a carrier through an agency, versus choosing someone she already knew (i.e. Kylie), and had to run a background check on her to make sure she was a fit for her family.

“You can either choose someone that you know or you can go through an agency, like Kanye and I did,” Kim wrote. “They ran a thorough background check, considered our gestational carrier’s medical history and made sure that she and our family felt as comfortable as possible.”

In the end, Kim defended her choice to hire a surrogate and explained that the process was harder than she imagined due to not being able to carry her own child. “Ayone who says or thinks it’s the easy way out is completely wrong,” she wrote. “People assume it’s better because you don’t have to deal with the physical changes, pain or complications with delivery, but for me it was so hard to not carry my own child, especially after I carried North and Saint.”

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There are a lot of rumors floating around out there about Kim and Kanye’s surrogate, but very little is confirmed. Kim’s essay on her experience shed a light on who she was, but more importantly, it inadvertently gave us a definitive answer to whether or not Kylie was her surrogate. Now, for the answer about Kylie’s pregnancy…