Which method of contraception is most likely to fail? a....

Key Concepts

Contraceptive Effectiveness

This concept addresses the likelihood that a given method of contraception will prevent pregnancy. It encompasses the statistical probability of contraceptive failure, which can vary significantly from method to method based on inherent mechanism and user adherence, distinguishing between theoretical perfect use and everyday typical use where human error plays a role.

Typical Use Versus Perfect Use

This key concept differentiates between the effectiveness of a contraceptive method when it is used consistently and correctly every time (perfect use) versus when it is used in real-life situations that may include user error or inconsistent application (typical use). Many methods, especially those requiring careful timing or consistent action, show a marked decrease in effectiveness under typical use conditions.

Fertility Awareness Methods

Fertility awareness methods, such as the rhythm method, rely on tracking the natural menstrual cycle to predict fertile days. They tend to have higher failure rates compared to other methods due to variations in cycle length and the requirement for strict adherence to timing, making them highly user-dependent and less reliable under typical use conditions.

Transcript

00:01 For this question, we're going to look at different methods of contraception.

00:03 And what we're talking about for contraception is we're going to try and stop conception of an embryo, right, or a fetus, a new organism that will be growing as a result of an egg being fertilized.

00:17 And we're talking about, of course, in a human context.

00:19 We don't really worry about contraception in other populations, although that might be an interesting topic when we're talking about species getting out of control with our populations.

00:28 But it's more for another day.

00:31 So when we're talking about these contraceptions, contraception, there are many different ways to go about it, and we can see the different rates of success of all of them.

00:39 So we need to ask which is most likely to fail.

00:44 So we'll just write most fails.

00:46 And we can look at different figures for each of these methods of contraception, which we will do and then look at them, and then see what makes the most sense, as far as being most likely to fail.

00:55 So answer option a is going to be the rhythm method.

00:59 Make sure that we spell rhythm, right? because it turns out this is the most, at least one of the most commonly misspelled words in the english language.

01:09 I think i got it.

01:10 So, hey, we're already off to a good start.

01:12 Now, the rhythm method, this is abstinence near time of the ovulation, right? so you look at the time where you're most likely to be present and not having intercourse at that time.

01:23 And we can associate a number of pregnancies per 100.

01:27 So this is per 100.

01:28 It's going to be 15 to 35.

01:34 Okay, so that's the range, 15 to 35 out of 100 women that perform this method have gotten pregnant.

01:42 Now, answer option b is going to be birth control pills.

01:46 I'll just write bcp for birth control pills.

01:51 And these are just to prevent ovulation.

01:54 So if you look at the instances per 100, it's zero to three.

02:02 Okay.

02:03 So that's the range.

02:05 And let's just keep on filling these in and just talk a little bit about what we're looking at as we go.

02:09 Answer option c is going to be diaphragms...