Zoloft twice a day

Emily
So I had concerns about the effectiveness of my Zoloft and talked to a psychiatrist today that I'm going to see to manage my medicine.
I'm currently on 50mg, but I'm pregnant and nearing my third trimester.  The psychiatrist said that it's possible that my body is metabolizing the medicine faster, and she suggested that I increase to 75mg, but to split the dose.  That is to say, she wants me to try taking the 50mg at night like I've been doing but follow up with a 25mg the following morning at breakfast or lunch time.  She said that way the medicine wouldn't be leaving my system before the next dose.
Has anyone heard of splitting the dose like this?  She said we can try this before we talk about a higher dose.  She said she's had some patients who needed their medicine this way and that everyone is different.  Just wondering if anyone else had done this before?