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"Grey&amp;#039;s Anatomy creator Shonda Rhimes has suggested that Callie&amp;#039;s pregnancy could make Meredith and Derek feel frustrated. Callie (Sara Ramirez) recently discovered that she is expecting Mark&amp;#039;s baby, but Meredith (Ellen Pompeo) and Derek (Patrick Dempsey) are still finding it difficult to conceive. Speaking to E! Online, Rhimes hinted that news of Callie&amp;#039;s pregnancy could have a big impact on the duo. She said: &amp;quot;I feel there&amp;#039;s a real level of frustration there, I&amp;#039;m sure, from a couple having trouble conceiving versus a couple who had a one-night stand and got pregnant.&amp;quot; Rhimes also defended the decision to introduce a new obstacle to Mark and Lexie&amp;#039;s romance, even though some fans have complained. &amp;quot;I have to say I really do love [the fans],&amp;quot; she said. &amp;quot;Even when they are sending me tweets of hate, I love them. It feels like everybody can&amp;#039;t be happy all the time. That&amp;#039;s not television, that&amp;#039;s a Hallmark card, and it&amp;#039;s charming but it&amp;#039;s not what we set out to do. Mark has some growing up to do and Lexie has some growing up to do and we&amp;#039;re working through that.&amp;quot; Grey&amp;#039;s Anatomy airs on Thursdays at 9/8c on ABC. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/greys-anatomy/news/a304285/greys-exec-teases-pregnancy-storyline/>