About Your Sacrum

Saturday Love Letter published on February 7th, 2026

Hi love,

How has February been treating you so far?

I’ve had a wonderful week. Two of my clients welcomed their babies, which meant my home visit and clinic schedules were a good bit lighter than usual. I did quite a bit of driving, though, and that’s often when I find myself thinking about what I want to share in these Love Letters.

This month, I want to take you with me into one small part of the body that does an extraordinary amount of work in birth: the sacrum.

We’ll begin with the most tangible, physical aspect of it.

During labour, as the baby slips deeper into the pelvis, the sacrum gradually moves backwards. Hinged at the sacro-iliac joints, it is designed to move. This backward movement is called nutation, and it happens as the baby’s head nestles into the sacral curve, often just before birth.

Have you ever heard of the Rhombus of Michaelis?

When a woman is upright and leaning forward at this point in labour, a rhombus-shaped puffiness can appear just above the buttocks. Often, a purple line develops between the cheeks and travels upward toward the rhombus. These are visible signs of powerful internal change and, for women who choose to decline vaginal examinations, they can also be used by midwives as external signs of full dilatation.

At the same time, the soft tissues of the pelvic floor are being deeply stretched. This is an intense phase of labour. For many women, full sacral nutation coincides with what we call transition, when the dreamy, oxytocin-rich state gives way to a more alert, adrenaline-fuelled one.

Physiologically, this shift prepares you to meet your baby awake and present. Emotionally, it can feel overwhelming. This is often the moment women say, “I can’t do this anymore.”

Again and again, women tell me that simply understanding what was happening in their body helped them stay with it.

Having witnessed this process hundreds of times, I tailor my late-pregnancy bodywork to support sacral mobility. I work around the sacro-iliac joints, releasing fascia to allow the soft tissues of the pelvic floor to respond more freely. I also suggest simple movements, such as pelvic circles, and invite couples to explore our Born Through Yoga workshops or online programme to learn more about movement for birth.

Over the next few weeks, we’ll stay with the sacrum. We’ll explore how touch, scent, movement, and breath can help you connect with your pelvic bowl, supporting your wellbeing in pregnancy while gently preparing you for birth and the postpartum period.

Due in March or April?
Reply to this email to find out how I can support you one-to-one, or how you can join our next Born Through Yoga group.

Love,
Nicole