
The Pill Explained: Why someone should consider taking it vs not taking it
READING TIME
5 min
AUTHOR

The Cyclist
The pill is having a moment online, and not a flattering one. TikTok has a lot to say about it. So does Instagram. Some of it is worth hearing. But a lot of it is missing context, and missing context in women's health? That's how we end up more confused and less empowered than when we started.
We pulled together insights from Dr. Amelia Ryan (gynaecologist and endometriosis specialist at Advanced Gynaecology Group, and Jess's own gynaecologist) and Dr. Stacy Sims (exercise physiologist and nutrition scientist at AUT, and one of the leading global voices on female physiology) to give you a more complete picture.
First thing to know about the pill - is you don't actually ovulate.
This is probably the most important thing most people on the pill don't know. When you're taking the combined oral contraceptive, you don't ovulate. And without ovulation, there's no real menstrual period. The bleeding you experience during the pill-free week is called a withdrawal bleed, caused by the drop in synthetic hormones, not by the natural shedding of a thickened uterine lining.
Dr. Stacy Sims puts it plainly: the sugar pill week is not a real period. It's a withdrawal. Your body isn't going through a menstrual cycle. It's reacting to the removal of hormones.
So you might wonder then, why do we bleed then? The short answer to that there is no medical purpose to bleed. The seven-day break was designed into the pill in the 1950s partly to make it feel like you were still getting a period, and partly as an attempt to get the Vatican on board with contraception. That attempt failed completely. The Pope said no. The seven-day break stayed anyway. And here we are, 70 years later, still bleeding on schedule for a reason that was never medical.
What's actually happening to your cycle.
A real menstrual cycle is a sequence of hormonal events orchestrated between your brain, your ovaries, and your uterus. Oestrogen rises, an egg is released, progesterone follows. If no pregnancy occurs, progesterone drops, the lining sheds, and the cycle begins again. This is a feedback loop, your body communicating with itself.
The pill works by suppressing that process. It introduces synthetic hormones at a steady level to prevent ovulation, effectively pausing the cycle. The feedback loop goes quiet. This is not inherently dangerous, but it does mean that for the time you're on the pill, your body isn't giving you the information your natural cycle would ordinarily provide.
This is also why the pill cannot "regulate your periods," which is how it's often prescribed and framed. Your natural cycle isn't being regulated. It's being paused.
So, why might you actually want to take the pill?
The obvious one is contraception. The pill is one of the most effective forms of birth control available when taken correctly, and for a lot of women, that's reason enough.
But for women with endometriosis, the pill may help endometriosis due to progesterone. Endometriosis is an inflammatory condition driven by oestrogen. Progesterone is anti-inflammatory - it's like the hormone equivalent of an ice pack on a swollen joint. It counteracts that inflammation directly, and over time can suppress symptoms and, in some cases, reduce endometriosis itself. The pill is one way to deliver progesterone consistently and may help to reduce symptoms.
There's also the PMS and PMDD angle. For women whose symptoms in the second half of their cycle are genuinely debilitating, the pill can stabilise hormone levels enough to take the edge off. And for some women, that steadiness can be life-changing.
So why might you not want to take it?
Equally valid question.
The simple reality about the pill, is that clinical trial data reflects a population average, not you specifically. Large studies haven't found a link between the pill and weight gain, or the pill and low mood, at a population level. But averages can mask a lot. Within those studies, some women lost weight and some gained it significantly. Some found their mood improved, others experienced real and distressing shifts. If you've been on a pill that made you feel terrible, that's not a character flaw or an overreaction. It's your individual response to a specific formulation, and it doesn't mean every formulation will do the same thing.
What also isn't widely communicated at the point of prescription is that the pill can deplete certain nutrients over time, including magnesium, zinc, B6, B12, and folate. For women who are already running low in these (which is more common than most people realise), it can compound existing deficiencies and quietly contribute to fatigue, mood changes, and other symptoms that are easy to attribute to something else entirely.
Another reason could be if you are trying to improve your training. Dr. Stacy Sims, exercise physiologist and nutrition scientist at AUT, has researched how the combined pill affects physical performance and recovery. Because the pill suppresses your natural hormonal fluctuations, it also blunts some of the physiological peaks your cycle would otherwise provide. As synthetic hormones build up across the three active weeks of the pill, recovery from training gets progressively harder. Her research suggests that for women on the combined pill, it takes roughly three days of training intensity to achieve the same adaptation a naturally cycling woman gets in two. It's not enormous, but if you've ever felt like your recovery is just slightly off and couldn't explain why, this might be part of the picture.
Finally, because the pill suppresses ovulation entirely, you lose the natural feedback loop your cycle provides. Your body stops communicating through its hormones in the way it otherwise would. For some women, especially those trying to understand an underlying condition or simply learn how their body works, that silence can feel like a loss of information they'd rather have.
The bottom line.
The pill is not a villain. It's also not without nuance. For some women it's the right tool, at the right time, for the right reasons. For others it genuinely isn't. Both are valid positions to land on.
What Dr. Ryan and Dr. Sims both push back against is the all-or-nothing framing. The online conversation tends to treat the pill as either a miracle or a poison, and neither is accurate. The more clearly you understand what it's actually doing, the better placed you are to make a decision that works for your body, your life, and where you're at right now.
It's also important to know, that the pill comes in many forms. What your mum took and what's currently prescribed are not the same thing. Most current prescriptions use significantly lower doses, and if one formulation doesn't suit you, that doesn't mean the next one won't.
So, if you're on the pill, weighing it up, or thinking about coming off it, talk to your GP. Not TikTok.
This post draws on insights from Dr. Amelia Ryan's appearance on The Cyclist podcast and published work by Dr. Stacy Sims. We are not medical professionals. For personalised advice, please speak with your GP or a specialist.


