Talk:Maternal physiological changes in pregnancy

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Neuromechanical adaptations to pregnancy is sufficiently similar that it should be merged here to reduce overlap. Doc James (talk · contribs · email) (if I write on your page reply on mine) 16:17, 17 June 2013 (UTC)



I am a French student in Translation, technical redaction and edition. I was wondering if I could contribute to this article and expand the information it provides by translating it in French?


Grg 29 (talk)

The "Maintenance" section[edit]

... appears to have no connection to pregnancy.-- Brainy J ~~ (talk) 19:59, 29 August 2014 (UTC)

Brain changes[edit]

I am thinking about this article recently published in Nature Neuroscience, which describes changes in the mother's brain. I was thinking of including it in this page but I have seen that there is no section devoted to neurological changes. Should I start a new one, even if for now it only contains this article? RinzeWind 20:07, 24 December 2016 (UTC) — Preceding unsigned comment added by RinzeWind (talkcontribs)

UCSF Medical Students Editing "Maternal Physiologic Changes"[edit]

Hi there,

We are a group of fourth-year UCSF medical students who are taking the Wikipedia elective at our school. We hope to improve the way health information is disseminated to the public by editing existing articles. Over the next few weeks, we will work on this page, modifying content and structure and adding new references. We hope the changes made will be helpful to anyone who visits the page!

Here are the changes/improvements we are working on

  • Add citations where already indicated and look for other places they could be added (Hormonal, breast (link lactation), cardio, hematology, metabolic, Renal, lower reproductive tract, Immune Intolerance, MSK/Gait
  • Delete text and add links that are related to physical symptoms of pregnancy
  • Make the language and wording clearer throughout the article
  • Expand the section regarding respiratory changes during pregnancy
  • Expand the section regarding GI changes
  • Consider deleting all the text explaining the fundamentals of postural stability unless it is directly related to pregnancy

Medded (talk) 06:08, 27 November 2017 (UTC)

Peer review of changes from course: All material added is relevant to the article topic The article is neutral The added citations are appropriate There is no obviously biased information — Preceding unsigned comment added by Pjb 88 (talkcontribs) 22:14, 14 December 2017 (UTC)

Delete Posture Maintenance Section[edit]

This topic doesn't really relate to pregnancy, although it is very well done. I'm planning on deleting it from this article, and trying to find a better place for it to live (like the posture article).

I've posted it below so someone can easily add it back if they disagree.


Ashleigh.lauran (talk) 16:50, 30 November 2017 (UTC)

Currently, there are 3 main hypotheses suggesting how humans maintain postural stability while standing.

Stiffness of ankle joint: The stiffness model was first introduced by Winter et al., in 1998,[24] and states that simple stiffness of ankle muscles account for the control of balance during quiet standing. The stiffness of the ankle muscle was determined experimentally by summing up the moments (or torque) left and right about the ankle and dividing it by the sway angle (angle at which the center of mass is displaced from the center of pressure). It was found in both analytical and experimental data (using human subjects) that there was a linear relationship between moments about the ankle muscle and sway angle. Additionally, the stiffness (i.e. total moment divided by sway angle) was found to be very close to 1, indicating a resemblance between the ankle joint and a perfect spring.

Moment arm of ankle muscles: The moment arm of ankle muscle hypothesis for postural stability was first developed in 1993 by Young et al.[25] and has been primarily seen in cats, though it is speculated that such mechanisms may also exist in humans. Results obtained from Young et al. showed that in the cat ankle joint, many of its muscles have predominant moment arms about the adduction/abduction axis. Smaller moment arms are found in inversion/eversion and about the principal axis of motion, dorsiflexion/extension. Additionally, Young et al. showed that the magnitudes of the moment arms in abduction/adduction and inversion/eversion strongly depended on joint angle. As the joint angle moved increasingly away from the neutral axis, the magnitude of the moment arms also increased. Such a finding suggests that, at least in cats, the coactivation of these agonist-antagonistmuscles is used for immediate stabilization in posture.

Proprioception: Proprioception means "sense of self". In limbs, proprioceptors are sensors that provide information about joint angle, muscle length, and tension, which is integrated to give information about the position of the limb in space. For postural stability, it has been suggested that stretch receptors may contribute to immediate stabilization in posture. However, researchers have found a weak correlation between muscle length and ankle joint angle, indicating that the stretch reflex is probably not the main contributor to postural stability. Additionally, there is approximately a 30 ms time delay between any stretch receptor response to a change in muscle length, which further supports the idea that stretch receptors may not have a big contribution to postural stability. However, this should not rule out the role of all proprioceptors in maintaining postural stability in humans.[26][27]

While these are the three leading hypotheses, of course there is always a possibility that there is a combination of all mechanisms that ultimately allows humans to maintain postural stability during quiet standing. Additionally, it is important to keep in mind that there are also many physiological factors such as weight, internal noise to muscles, etc. that may come into play when trying to understand the factors that contribute to postural stability.

24. Winter D.A.; Patla A.E.; Rietdyk S.; Ishac M.G. (2001). "Ankle Muscle Stiffness in the Control of Balance During Quiet Standing". Journal of Neurophysiology. 85: 2630–2633.

25. Young, R.P., G.E. Loeb. "The distal hindlimb musculature of the cat: multiaxis moment arms at the ankle joint". Exp Brain Res (1993) 96:141-151.

26. Bloem B.R.; Allum J.H.J.; Carpenter M.G. (2000). "Is lower leg proprioception essential for triggering human automatic postural responses?". Exp Brain Res. 130: 375–391. doi:10.1007/s002219900259.

27. Bloem B.R.; Allum J.H.J.; Carpenter M.G.; Verschuuren J.J.G.M.; Honegger F. (2002). "Triggering of balance corrections and compensatory strategies in a patient with total leg proprioceptive loss". Exp Brain Res. 142: 91–107. doi:10.1007/s00221-001-0926-3.

RE: Delete posture section[edit]

It appears this material already exists in Neutral spine. Emwhitaker (talk) 18:29, 30 November 2017 (UTC)

RE: Delete posture section[edit]

Yep, I put the posture section in the Neutral spine article earlier today shortly after deleting it from this article. After looking around at different posture and balance articles, I thought that was the best available place to put it (at least for now).

Ashleigh.lauran (talk) 00:36, 1 December 2017 (UTC)

Wikiproject medicine peer review[edit]

. Peer review:

Thanks for your collective work on this article. 

After reading the page, I thin everything in the article is relevant and presented in a balanced fashion with appropriate new references. There are some older references that seem to be primary sources.

There are a few sections that still need citations added. These are the following sections:

- Hormonal - fetal-placental unit - Breast size - Edema - Metabolic - Nutrition - Body weight Oni1981Oni1981 (talk) 23:36, 11 December 2017 (UTC)

Peer Review[edit]

Peer-Peer Review Notes: - Opening: love the intro, a great quick summary of what will be explained in the subsections with clear descriptors of the different organ systems in both technical and “layman’s” term. - Great job keeping the language straight forward and simple in the endocrinology portion. - Would recommend adding some extra hyperlinks in the endocrine section, like “hypothalamic axis”. I know that there is a balance between too much links and too little, but providing quick links to complex material may outweigh the cons of overlinking. - Really love the breakdown by organ systems. Easy to digest and to look up specific information.

DT — Preceding unsigned comment added by Dtorres123 (talkcontribs) 03:58, 13 December 2017 (UTC)

Peer-peer Review Response[edit]

Thank you for the great feedback! Added some hyperlinks to terms, like hypothalamic axis, in the endocrinology section. (talk) 01:50, 15 December 2017 (UTC)

External links modified (January 2018)[edit]

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Hello wikipedia! I do not know how to edit articles properly and I'm in a hurry so I won't check just now (with apologies) BUT there appears to be a contradiction with regard to maternal respiratory rate which is in need of fixing. The introductory paragraph states "breathing increases", but section 10 on respiration states respiratory rate does not change. Is someone able to confirm which is true and edit accordingly? Many thanks! — Preceding unsigned comment added by 2A02:C7D:EC:6300:C813:C885:85E9:EB3 (talk) 17:12, 2 April 2018 (UTC)