Maternity and pregnancy fashion has a fundamentally different customer relationship than standard apparel. Every customer knows they'll only wear the product for a finite period — typically 5 months of visible bump — and may be buying maternity clothing for the first time with limited knowledge of how sizing works during pregnancy. WooCommerce maternity stores typically used custom fields for pregnancy-specific sizing guidance and ACF for nursing feature data. Shopify handles this well through metafields, with specific attention needed for size guides, nursing functionality, and the growing rental model.

Maternity product categories

Maternity dresses: Wrap styles, empire waist, jersey — accommodate bump from second trimester through full term
Maternity jeans and trousers: Over-bump panel, under-bump elastic, side-stretch — most complex to size
Maternity tops and blouses: Longer hemlines, ruching at sides for growth room
Nursing tops: Clip-down, wrap, or layer-over feeding access — dual-purpose maternity/nursing
Nursing bras and lingerie: Maternity bras, nursing sleep bras, postpartum support
Maternity workwear: Office-appropriate maternity — dresses, blazers, trousers
Active and loungewear: Maternity yoga, gym leggings, comfortable everyday wear
Occasionwear: Maternity wedding guest, evening wear, baby shower outfits
Postpartum: Post-birth recovery clothing — nursing-compatible, comfortable waistbands
Hire/rental: Short-term occasionwear rental — dress for one event, return after

Pregnancy sizing metafields

Standard clothing sizing doesn't translate directly to maternity. Customers need guidance on both their pre-pregnancy size and how the garment accommodates bump growth:

product.metafields.maternity.size_based_on (single_line_text) — "Pre-pregnancy size" or "Regular size" — how to choose size
product.metafields.maternity.bump_accommodation_from_weeks (number_integer) — when the garment comfortably accommodates a bump (e.g., 12 weeks)
product.metafields.maternity.bump_accommodation_to_weeks (number_integer) — when the garment comfortably fits until (e.g., 40+ weeks)
product.metafields.maternity.postpartum_wearable (boolean) — can this be worn after birth (non-bump occasions)
product.metafields.maternity.postpartum_wearable_note (single_line_text) — "Wrap style works 6 months post-partum"
product.metafields.maternity.over_bump (boolean) — for trousers/jeans: over-bump panel style
product.metafields.maternity.under_bump (boolean) — under-bump elastic style
product.metafields.maternity.ruched_sides (boolean) — side ruching for growth accommodation

Nursing and feeding features

product.metafields.maternity.nursing_friendly (boolean) — can be used for breastfeeding post-birth
product.metafields.maternity.nursing_access_type (single_line_text) — "Clip-down straps", "Wrap style", "Crossover neckline", "Layer-over"
product.metafields.maternity.nursing_bra_compatible (boolean) — for tops: works with nursing bra clip access
product.metafields.maternity.feeding_discreet (boolean) — can feed without exposing midriff
Render on product page: display nursing features prominently. A customer shopping at 32 weeks is often planning ahead for nursing — nursing compatibility is a purchase driver even before birth.
Nursing collection: create a dedicated "Nursing Friendly" collection using automation (tag: nursing-friendly) — customers returning to shop postpartum can filter directly.

Maternity size guide

Maternity size guides are more complex than standard fashion size guides because they need to address the bump variable:

Size guide page per category: maternity dresses, maternity jeans, maternity bras — each category has different sizing logic
Table format: columns = size (6/8/10/12/14/16) + pre-pregnancy bust/waist/hip + bump accommodation
Maternity jeans special: include waistband type (over-bump vs under-bump) and note which trims work better at which stage
Bra sizing: separate bra fit guide. Cup size often increases 1–2 cups during pregnancy. Guide customers to measure at 30 weeks for best fit.
Size guide metafield per product: product.metafields.clothing.size_guide_url — link to the relevant category size guide

Maternity rental model

Growing trend: renting maternity occasionwear for one event rather than buying. Customers spend £50–200 on a dress worn once. A rental model at £25–60 per 4-day hire captures this market:

Shopify doesn't have native rental functionality. Options:
- Rentity or ByTheHour app: adds rental/booking product types to Shopify
- Custom flow: "Request to hire" button → contact form → manual booking via email or Calendly
- Separate Shopify store: dedicated hire store with different product setup
Rental product variants: each size is a separate rentable item. Set inventory to 1 per size (only one of each dress in stock to hire).
Hire period: standard 4-day hire (delivered Thursday, returned Monday). Set delivery expectations clearly on product page.
Cleaning: include dry cleaning fee in hire price, or charge separately. Display clearly.
Damage policy: include in product description and a dedicated Hire Terms page. Link from every hire product.
WooCommerce rental migration: export hire calendar data, customer bookings, and deposit transactions. Recreate active bookings manually in new system.

Occasionwear filtering

Event-specific collections: "Maternity Wedding Guest", "Baby Shower Outfits", "Pregnancy Party Dresses" — high-intent search terms
Trimester filtering: create collections or use tags for different trimesters: "Second Trimester", "Third Trimester" — customers often search by stage
Neckline and style filtering: wrap dress, maxi dress, midi dress — standard fashion filters apply. Enable in Shopify Search & Discovery app.
Bump-friendly badge: display on collection pages for products that accommodate larger bumps. Use metafield-driven badge: if bump_accommodation_to_weeks >= 38, show "Full-term friendly" badge.

Gift guide pages

Baby shower gifts and "push presents" are significant revenue drivers for maternity retailers — and they're purchased by people who may never have been to the site before:

Create a Baby Shower Gift Guide page: curated edit of gift-appropriate pieces (comfortable loungewear, nursing tops, occasionwear)
Price filter for gifts: £0–50, £50–100, £100+ sections on the gift guide page
Gift messaging: enable gift notes in checkout — Shopify supports order notes natively; configure in theme settings
Gift wrapping: gift wrapping add-on product or order-level upsell at checkout
Gift card: create a gift card product for the indecisive gift buyer — particularly useful when the recipient hasn't yet determined her bump size

Maternity fashion migration checklist

Create maternity metafield namespace: size_based_on, bump_accommodation_from/to_weeks, postpartum_wearable, over_bump, under_bump, nursing_friendly, nursing_access_type
Migrate WooCommerce ACF maternity fields to Shopify metafields
Build category-specific maternity size guides (dresses, jeans, bras)
Set up nursing-friendly badge and collection (tag automation)
Create event-specific collections (Wedding Guest, Baby Shower)
Configure Search & Discovery filters for bump stage and nursing compatibility
If offering hire: install Rentity or set up custom hire enquiry flow
Create Baby Shower Gift Guide page with curated product edit
Enable gift notes and gift wrapping at checkout
Set up size guide links from all maternity products via metafield
Create postpartum/nursing collection for repeat post-birth visits
Test: browse by trimester → filter nursing-friendly → add to cart → gift note added at checkout

The repeat customer window for maternity retail is short and precious: you have approximately 5 months during pregnancy, and potentially another 6–12 months if the customer is nursing. After that, she may not buy maternity clothing again for years. The stores that succeed long-term in this category are those that capture the nursing and postpartum phase — continuing to sell comfortable nursing tops, postpartum loungewear, and eventually children's clothing to the same customer. During migration, set up the nursing and postpartum collections and product tagging to position the store for this natural customer lifecycle extension — it doubles the addressable period per customer and dramatically improves customer lifetime value.

Migrating a maternity & pregnancy fashion store from WooCommerce to Shopify (2026)