There aren't good studies on the safety of home vs. hospital because in many ways the data just doesn't exist at a meaningful level. To truly compare CPM care to OB care, you can't just look at "Where the birth happened", but where the parents planned for the birth to happen, who they were seeing  in pregnancy, etc. We saw from one look at the data that comparisons of birth at term showed better results for OBs...but given current OB practice, how much less likely is an OB patient to make it to term in the first place? How many are likely to be "risked out" for specious reasons, and therefore managed by a high risk practitioner?Â
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I'm not going to go to the studies right now, but to personal experience.Â
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I had an embolism when I was 19, due to a then-undiagnosed heritable thrombophilia and birth control pills (prescribed by a CNM working for a student health clinic, ironically, after I told her, "You know my mother had a clot while pregnant, are birth control pills safe for me to take?") It was misdiagnosed by several practitioners until I finally took my sorry ass to the ER where they figured out I'd lost 3/4 of my lung capacity to a massive embolism over the course of three weeks. Clot busting drugs gave me my lungs back, but from then on out, I was labeled "High risk".
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I got pregnant about 18 months later (see: birth control pills nearly killed me), assumed because of the high risk label that I'd have to seen an OB, went to an OB and was told, "No you're too high risk for us, you have to go see the perinatologist."
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So don't get me started on the whole "OBs see higher risk patients anyway". Confronted with anything remotely out of the "usual" set of problems, they seem to pass the buck way faster than a midwife will.Â
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The perinatology clinic said, "You're fat and you had a clot, you're high risk, here, take heparin."
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My mother nearly died during her last pregnancy taking heparin. First she clotted, then went on heparin, they never got her stable, the placenta abrupted, clotted, and then she nearly bled to death while losing the baby.
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I said no.
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They sort of blinked and shrugged their shoulders and I had zero problems with clotting, due the the serendipity that WIC's only palatable frozen juice was 100% welch's pure grape juice. Which is an anticoagulant, but no one knew that at the time. I saw a naturopath, who had me take garlic and ginger to reduce my clotting risk, as well.
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My blood sugars were on the low end of normal. My blood pressure was ridiculously normal. Despite being fat, I had nice ankles even up to term.
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Sometime in the third trimester, I started fantasizing about locking myself in the bathroom at the hospital and not coming out until the baby was born. Good instinct. I hired a midwife to act as my labor support.Â
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Had I not, the contractions I started having at 35 and 36 weeks would have sent me in to the hospital, where they would have seen me dilate from 1 to 2 and then things peter out, and they would have jumped on the high risk bandwagon and scared me into "augmenting" what was really just annoying prodromal labor. My midwife instead came out to my house and checked me, listened to baby, had her oxygen with her in case things actually did take off faster than we could get to the hospital, and when things petered out, she said, "Good. Have a half glass of wine and a bath and call me if they pick up again."
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She came out and sat with me through contractions at least 3 times before I hit term. She wasn't a CPM yet, she was an apprentice-trained midwife without a high school diploma, with more common sense in her little pinky than the entire hospital had, combined. Because she was there with me, checked baby, paid attention, and had as her priority to help me keep things normal, I didn't end up going into the hospital until I was in labor for real, at 40 weeks 3 days.
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I told the hospital "No" at every turn. No, they couldn't use the belts to keep the monitors on, if they wanted to monitor, they could stand there and hold the damn things in place. Nurses bore easily. This resulted in textbook intermittent monitoring. No, with a clotting disorder, I do not consent to have heplocks or IVs placed unless I actively need IV meds. EVER. No, I didn't want to talk to the anesthesiologist. No, I don't want to sit down, I want to walk.
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That hospital had a 90% epidural rate. They had no freakin' CLUE how to manage a labor like mine. Not one thing they did made the process safer, and the rapid cord clamping made my daughter anemic. Forcing me into a semi-sit to push created a nasty tear. A clueless doctor who thought that my desire for "natural" meant she should take fewer stitches in my bottom meant that my bottom will never, ever be the same without surgery. Nurses came to "check my incision" and "Ask how the drugs were helping" even though I had not had a cesarean and didn't even know the drugs had been prescribed (and was not taking them). Because of faint, faint staining of the waters, they stuffed a suction tube down my daughter's throat to her vocal cords, despite the fact that she was screaming her fool head off and clearly fine.
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I spent the next 11 years reading about birth. I was so done with the whole medical establishment that I knew that with my risk factors (by then I'd added asthma and apnea and another 30 pounds) I might not find a midwife, but there was no way in hell I was going back to OB care. I planned for a UC, but miscarried. Ironically, a day after talking to a perinatologist about being able to consult with him on some of the risk factors, and having him tell me, "90% safety isn't good enough". I'd written back to him saying, "You can't guarantee 100% safety. You can't guarantee I won't miscarry next week."
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After losing the baby, I got pregnant again, and interviewed midwives, because I wanted some access to the system if I needed it. Of the four I interviewed, only one truly demonstrated commitment to informed consent and my right to refuse treatments I did not feel necessary. I ended up hiring her, and because she trusted me and I trusted her and she LISTENED, I did have her at my birth, and she helped keep me from panicking when things weren't "textbook" but were still safe enough for home. In the hospital, I would have been sectioned. In the hospital, my baby would have been in the NICU. Neither option would have improved our outcomes over what we did at home. In fact, most of the kids with her syndrome born in the hospital end up having MORE problems than my little girl does.Â
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This pregnancy, I have a different midwife for a variety of reasons, and it's really the ideal. No one can come up with research to demonstrate the safety of this approach, but I'm being seen by a midwife who consults regularly with a perinatologist. I will birth at home, 7 minutes from a high-risk facility. Our door-to incision time may be as short as 15 minutes if it comes to that. My midwife is okay with me getting ultrasounds as needed, and taking prescribed medications. We have a plan for coping with my risk factors. They are all, currently, decently controlled.
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And while I may be 300+ pounds with a host of chronic medical issues, I also have a history of very normal births, fast, no gestational diabetes, no high blood pressure, adn even now, at 7 1/2 months pregnant, my bp is running 102/58, my glucose has never managed to get higher than 112 (1 hour after eating) and  no one has given me any convincing data that hospital birth would likely improve out outcome, and there's plenty of evidence it could hurt us if we did it unnecessarily.Â
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All that said, I NEVER hand my care over to anyone. Ever. That way lies malpractice and I've regretted it every time I've tried.Â