WWYD (Low slow rising beta)

Backstory:
I don't have issues getting pregnant it's making it stick is my issue. I had a chemical back in November then a MMC in July. After the second miscarriage I start to see an RE.

This month I did my second medicated IUI.
I had between 3-4 follicles. Got a BFP 10dpiui then I got what I thought was my period on 12dpiui. Thought I was having another chemical. Had a beta on 15dpiui and it was 27. Here are my betas from the rest of the week.

17dpiui: 40
18dpiui: 46
20dpiui: 65
22dpuiu: 124

I know these number are less than ideal but doctor wants to do a biopsy to start a natural miscarriage. I'm hesitant to do it because my numbers are going up but slowly. Since I had so many follicles I wonder if I had a vanishing twin that caused it my betas to be screwed up. I'm so confused on what to do. I don't want to hold onto something that will just inevitably end bad but also don't want to do anything so drastic. Thanks!!

Re: WWYD (Low slow rising beta)

If it were me I would probably wait. With my DS my numbers did not exactly double and they made me so nervous thinking the worst. Also are you on progesterone? That may be why you bled at first (happened to me, and next cycle I went on crinone). Good luck!

Re: WWYD (Low slow rising beta)

I personally would do one more beta check but based on your numbers I can see why he wants to do the biopsy to start a natural miscarriage.

At 22dpiui your beta should be in the thousands but I've seen things happen so request 1 more beta and if the numbers are still low then I would do a D&C.