You will find a lot of articles on the internet and on the internet in general that tell you that you should only use sex hormones as a last resort and should never use any of the other products. If you are new to the topic, I suggest you read the articles that have already been written on the topic by experts in the field, such as Dr. Jannet and Dr. Pomeroy. They have some great information. The bottom line is that sex hormones are just a temporary way of getting ready to get pregnant. Most of the time, they don't work very well, and if you want to use sex hormones it is best to use the regular birth control pill or IUD.
Can I get pregnant by having sex? Yes, but only when you're using the right type of sex hormones. If you are using the wrong type of hormones, or have taken other hormones in the wrong amounts and for the wrong amounts, then you will get pregnant. A woman's body produces enough of the hormones for the pregnancy to occur, but the hormones are not released in the same proportions for all women. The hormones that don't release as well in the uterus are the ones that most women want to have an egg retrieved from their ovaries.