+61 422 134 925
Email Us
Login

Facebook Google

logo


Login with your site account

Facebook Google

logo



Lost your password?

Performance Through Health Performance Through Health
  • Home
  • About Me
    • The Mission
    • About Martin McPhilimey
  • Services
  • Blog
  • Video
  • Podcast
  • Testimonials
  • Contact
  • Bookings
  • Home
  • About Me
    • The Mission
    • About Martin McPhilimey
  • Services
  • Blog
  • Video
  • Podcast
  • Testimonials
  • Contact
  • Bookings
  • Home
  • Blog
  • Impact of menstrual cycle phase and oral contraceptives on sleep and overnight memory consolidation

Blog

14 Jul

Impact of menstrual cycle phase and oral contraceptives on sleep and overnight memory consolidation

  • By Martin McPhilimey
  • In Blog, Sleep

Sleep, Menstrual Cycle & Memory

Introduction

Sleep plays a vital role in the consolidation of memories. In fact, during NREM stage 2 sleep, there are short bursts of high amplitude electrical activity called sleep spindles, and it’s these spindles that are electrophysiological markers for sleep-dependent memory consolidation.  In the scientific literature, sleep spindles are also considered biological characteristics for general cognitive abilities. Research suggests that hormonal changes across the female menstrual cycles alter sleep architecture, with evidence showing NREM2 sleep is higher during the luteal phase than the follicular phase. Furthermore, studies indicate that women taking oral contraceptives have more NREM2 in the active phase when supplementing with exogenous hormones than the non-active placebo phase and in those with naturally occurring menstrual cycles. However, limited studies have investigated the relationship between sleep spindle characteristics, menstrual cycle phase, oral contraceptives, and sleep-dependent memory consolidation.

Method

This study took 62 females in three different groups of women: (1) naturally cycling women in the luteal phase (characterized by a high endogenous progesterone level), (2) cycling women in the follicular phase (characterized by a low endogenous progesterone level, and (3) women using OCs (characterized by a low endogenous progesterone level but with potent synthetic progestins). Sleep spindle density and salivary progesterone were measured during an adaptation and an experimental night. In addition, a word pair association task preceding the experimental night followed by two recalls (pre-sleep and post-sleep) was performed to test declarative memory performance.

Results

Before sleep, there was no significant difference between all three groups regarding intelligence assessed in the cognitive performance tasks. However, there was a positive effect of sleep on memory consolidation after a learning task. It is more pronounced in women using OCs and naturally cycling women during the luteal phase than naturally cycling women during the follicular phase.

Interestingly, these data also aligned with higher sleep spindle density in naturally cycling women during the luteal phase than women during the follicular phase and those using OCs compared to naturally cycling women in the follicular phase. These findings suggest that menstrual cycle oscillations in progesterone and the application of synthetic sex hormones modulate fast sleep spindle density.

Finally, the data revealed a highly significant change in memory performance in those groups (OC’s and Luteal Phase) where fast spindle density was increased overnight compared to the follicular group with significantly lower spindle density and no change in the overnight memory performance. Therefore, menstrual cycle oscillations of the sex hormone progesterone and synthetic sex hormones influence fast sleep spindle density and thus may alter sleep-dependent memory consolidation.

What does this mean for women on OC’s and during their menstrual cycle?

What you do have to remember is that we can’t compare apples to oranges here. This study was a tight-knit group of women who went through vigorous inclusion criteria. Therefore, it does not reflect the general population of a female who may be taking OC’s that are not progestin dominant. Nor does it consider other hormones that may vary between individuals, such as estrogen and testosterone, as well as neurochemicals such as dopamine and serotonin, all of which play a role in cognitive performance and memory recall.

However, it suggests that for women with naturally occurring menstrual cycles, it could be of additional benefit to time tasks that involve recalling information such as examinations or presentations during the luteal phase if possible and in their control. Not to say that it’s necessary but from a cognitive performance perspective knowing this information could be helpful.

References

Plamberger, C. P., Van Wijk, H. E., Kerschbaum, H., Pletzer, B. A., Gruber, G., Oberascher, K., … & Hoedlmoser, K. (2020). Impact of menstrual cycle phase and oral contraceptives on sleep and overnight memory consolidation. Journal of Sleep Research, e13239.

https://onlinelibrary.wiley.com/doi/10.1111/jsr.13239

Tags:menstrual cyclessleep
  • Share:
Martin McPhilimey
Martin McPhilimey

You may also like

NSDR Protocols

NSDR Protocols | What are they and how to use them

  • May 6, 2022
  • by Martin McPhilimey
  • in Sleep
NSDR Protocols are techniques to help you enter a self-directed internal calm state. Yoga Nidra, breathwork or hypnosis. NSDR...
Sleep scientist martin mcphilimey
Can Melatonin Help You Sleep?
April 14, 2022
Jack Feldman Huberman podcast
Summary of Dr. Jack Feldman: Breathing for Mental & Physical Health & Performance | Huberman Lab Podcast
January 20, 2022
BOLT Score
Measuring Your BOLT Score | Oxygen Advantage
January 20, 2022

Category

  • Blog (29)
  • Breathing (11)
  • Personal Development (6)
  • Podcast (65)
  • Sleep (12)
  • Stress/ Recovery (12)
  • Uncategorized (1)
  • Video (37)

Recent Posts

NSDR Protocols
NSDR Protocols | What are they and how to use them
06May,2022
Non-Sleep Deep Rest
Non-Sleep Deep Rest | NSDR | Deep Nervous System Relaxation (7 mins)
06May,2022
Dean Gladstone Bondi Rescue
Power Of The Breath with Bondi Rescue Lifeguard Dean Gladstone
30Apr,2022

Get in touch

+61 422 134 925

martin@performancethroughhealth.com

Perth, Western Australia

Useful Links

  • Mission
  • Resources
  • Products
  • Testimonials
  • FAQs

Social Links

  • Facebook
  • Instagram

Framework

Enter details below to download my mentorship framework now.



© 2017 - 2022 Performance Through Health by Martin McPhilimey