Hi, Alora. Getting started with HRT is a big step, and pretty exciting. It wi what had the biggest impact on my state of mind.
Generally, the patches will give you the steadiest level of estradiol. Drawbacks are keeping the pesky things in place, as the edges will catch on clothing and cause the patch to lift. I use some taping tricks to eliminate this.
https://www.susans.org/forums/index.php/topic,215714.msg1910024.html#msg1910024Other patch drawbacks are the cost, about $10 a patch if you are paying the bill. Insurance may help. The strongest patches are still aimed at treating post-menopausal and oophrectomy/hysterectomy patients, and only add roughly 50-80 pg/mL serum estradiol in many cases. In a AMAB body, there is precious little to start with and one patch is unlikely to do the trick. (I never got above 50 pg/mL.) I'm currently on two twice a week patches at a time, $40 US a week in patches. I'll get the level re-checked in February.
Pills are cheap, but they put a bit of a load on the liver as oral delivery involves a first pass through the liver that patches and injections bypass. Delivery can be fairly smooth, particularly when splitting a dosage to take the pills twice a day.
Intra-muscular injection is cheaper than patches, and you KNOW the stuff is getting into your system, very reassuring. It has the largest swings in serum level, when given at the typical 14 day interval. The doctor can prescribe more frequent, smaller injections, which smooths things out, but means more trips to the doctor or injection center unless you learn to do it yourself. Traveling with vials of estradiol and syringes can be problematic, particularly international travel.
I bet others will be along shortly to provide vast quantities of data. This is just my subjective opinion and the results of my research into what I wanted. Your mileage may vary. Content are sold by weight not volume. Content may settle during shipment. The plastic bag is not a toy.
Mental relief: I started spironolactone antiandrogen about 3 weeks before estradiol, and I still haven't gotten to a transition level of estradiol after 7 months. The spiro swatted my testosterone levels down fairly quickly. Around 11 days in I started to feel periods of calmness, a sort of quiet as the mental noise of flickering, distracting thoughts faded away. This happened more often over the next month and became my new normal state. Estradiol gave me a little bit of a lift, a feeling of more energy. I was on one biweekly patch per week, and if you look at how these patches work, the E delivery drops off pretty quickly after 84 hours/3.5 days. By Day 7 I definitely felt irritable.
Breast tissue growth: I noticed the formation of breast buds, and the soreness and puffiness around the areola about 2 months in. I had a running start in breast growth from 6 years on finasteride and gynecomastia

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- Michelle