<P> In its original broadcast on NBC, "The One with the Embryos" acquired a 17.3 Nielsen rating, finishing the week ranked fourth . The episode received critical acclaim, is generally considered one of the best of the entire series, and is a favorite amongst the cast members and producers . In 2009, "The One with the Embryos" was ranked #21 on TV Guide's list of "TV's Top 100 Episodes of All Time ." </P> <P> When Joey and Chandler (Matt LeBlanc and Matthew Perry) correctly identify the contents of Rachel's (Jennifer Aniston) shopping bag, Monica (Courteney Cox) suggests a trivia contest to see who knows more about whom: the men or the women . They place a $100 bet on the outcome and Ross (David Schwimmer) puts together some questions and plays as host . Meanwhile, Phoebe (Lisa Kudrow) has agreed to be a surrogate mother for her brother Frank (Giovanni Ribisi) and his older wife Alice (Debra Jo Rupp), but is concerned that they are paying $16,000 for the IVF procedure which only has a 25% chance of success, and is helpless to influence the results . </P> <P> The trivia game begins, with various facts about the characters being revealed such as Joey's space - cowboy imaginary friend (Maurice) and Rachel's actual favorite movie (Weekend at Bernie's). A nine - to - nine score leads to a lightning round . Monica raises the stakes: If the women win, Joey and Chandler must give up their birds, as the maturing Chick is crowing in the mornings and waking them up . Chandler rebuts by suggesting Rachel and Monica give up their apartment to them, which Monica agrees to without consulting Rachel . The girls lose the lightning round because they cannot identify Chandler's job, and the boys win . </P> <P> As the four pack up their respective apartments--Rachel, in particular, displeased about having to switch--Phoebe returns home and takes a pregnancy test, though it is too soon for a result . Later with packing complete, Rachel finally refuses to move as Frank and Alice come by with another pregnancy test . The boys and the girls begin to argue along with Ross, which is cut short when Phoebe emerges from the bathroom and joyfully announces she is pregnant, the mood turning to one of celebration . </P>

What episode of friends do rachel and monica lose their apartment
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