Back in the Middle Ages in Europe, women's everyday dresses were typically full and forgiving enough to readily double as maternity wear. It wasn't until the early 14th century, when silhouettes started to follow the female form a bit more, that specific design elements were introduced to make clothing more pregnancy-friendly.
Here's another look at modest maternity style in the 13th century. Heavy materials like velvet became popular for dressing gowns at this time, which helped further conceal bumps.
No seams to take in or let out, just lace-up panels that could be loosened to accommodate a growing baby bump.
Aprons, too, were commonly used to help hide a pregnant belly.
Overcoats had lace-up vents in the back, making them adjustable to fit.
One of the reasons maternity wear was not as important during the Renaissance era was that during a woman's later stages of pregnancy, she usually stayed home—meaning she would dress in robes and dressing gowns and had no need for clothing adjustments.
The first recorded maternity gown came about in the Baroque period and was called the "Adrienne," which featured an empire waist.
The Adrienne style dress also consisted of folds under the waistline and flowing fabric that helped with a growing bump.
By the time we were approaching the Georgian period, the Adrienne dress had evolved to include a bib around the bust to make breastfeeding easier.
As the fashion in the 16th century required petticoats and corsets to attain the ideal figure, many women continued to wear corsets while pregnant.
This dress features slits in the bust to permit women to more easily breastfeed their baby—a duty which was, for most of the 18th century, been delegated to a hired "wet nurse."
Many women could not afford new clothes while expecting and had to make due with their previous wardrobe. In these cases, when their bump grew so big that letting out their back laces didn't work anymore, they would wear a shawl or scarf to hide the opening in the back of their dress.
In the thick of the Victorian era, pregnancy was considered a condition to be concealed. Enter: the maternity corset. This cringe-worthy garment was structured with whalebones and intended to restrict and minimize the appearance of a baby bump. And doctors endorsed them...
The Gossard maternity corset's slogan promised "Better Babies," as women were convinced that the contraption would provide exercise that was necessary during pregnancy–while also promising to keep the figure looking trim.
It's worth noting that most of the maternity style developments to this point were more or less exclusive to wealthy women. Women in poor or working class families typically just wore baggy, oversized dresses during their pregnancies.
"Clothes of Prospective Mothers Should Have Quality of Beauty as Well as of Comfort." A novel concept, indeed.
Sadly, the maternity corset was still a mainstay for expectant mothers well into the early 1900s.
Benito Mussolini's pregnant wife sporting the popular empire waist.
Progressing into the 1920s, maternity style relaxed a tad. Softer silhouettes with draped and belted waistlines were the early signs that confining garb was on its way out.
But not quickly enough. The mindset of the times was still to hide away any signs of pregnancy. "Be entirely free from embarrassment of a noticeable appearance during a trying period," said one 1923 maternity wear ad in Good Housekeeping.
And women across America breathed a (literal) sigh of relief.
Those drop-waist dresses were the perfect amount of slouchy to accommodate the early stages of a belly.
The 1930s saw a return of a more conservative standard in mom-to-be style. Feminine waistlines and slim figures were very much in vogue, meaning pregnant women relied on small prints and adjustable waistbands to camouflage their "condition."
Flounced necklines, capes, and oversized bows and embellishments helped women hide a bump for a little bit longer.
Instead of dresses, separates started coming into play in the '30s. Pleated trapeze tops could be cinched during early months and worn more loosely once a bump started to show.
For the most part, the 1940s saw similar maternity fashions to the '30s.
Long, billowy button-downs were a sure tell sign that a woman in the 1940s was expecting.
Shirtdresses and wrap styles also became popular. A wraparound cut allowed the dress to grow with a woman's changing body, while the button-down silhouettes provided an easier solution for breastfeeding mothers.
Separates that could accommodate a woman's bump at any stage in her pregnancy continued to be popular throughout the decade.
Queen Elizabeth stayed true to the style of the decade in an A-line dress suit at four months pregnant with Prince Charles.
Fashion leaned into maternity wear in the 1950s....thank goodness.
Separates really took off by mid-century. And finally, PANTS!
Lucille Ball was a pioneer for all moms-to-be. She was the first woman to appear pregnant on-screen, publicly and openly celebrating her burgeoning bump.
Ball popularized the maternity style of the '50s, appearing on her hit show I Love Lucy in demure smock tops and voluminous separates.
A wide, tent-like top over a slim-fitting skirt or capris was a signature of the decade.
Grace Kelly no doubt inspired women to look chic while pregnant, with her maternity ensembles.
Elizabeth Taylor adopted the combination of a pencil skirt and dress-like tunic as her maternity uniform.
And continued to maintain her iconic glamour throughout her expecting months.
A Nautical theme for the mother-to-be
Elegant simplicity was the name of the maternity game with the onset of the 1960s. And no one embodied it better than Jackie Kennedy. The style icon opted for chic shift dresses and boxy separates while pregnant with her son.
While pregnant with Prince Edward, Queen Elizabeth wore a sleek velvet dress and matching jacket to conceal her bump.
In order to make room for an expectant mother's belly, some dresses featured inverted pleats.
Princess Margaret uses a loose overcoat to accommodate her growing bump.
Mia Farrow filming "Rosemary's Baby", put pixie perfect maternity fashion on the big screen.
Peasant tops and bohemian maxis were a pregnant woman's best friend.
Hemlines were at an all-time high throughout the country and pregnant women made no exception with their maternity wear.
Jane Birkin epitomizes comfort and ease in a cotton sun dress that compliments her bump.
Participants in the "Mother-to-Be of the Year" competition are seen here being judged on their maternity fashion and beauty.
Behold: Winner of the 1972 "Mother-to-Be of the Year" competition.
Carly Simon kept it disco glam during her pregnancy by throwing on an ultra-luxe fur coat. (Side note: Let's hope that's water in her glass.)
Yoko Ono throws a fashionable kimono robe on over her expectant bump.
Tiered maxis were a popular style of the decade in general, but proved especially useful in covering a blossoming baby bump.
Cher looks perfectly bohemian in her floral maxi dress and vest that extenuates her bump.
Bebe Buell pregnant with daughter Liv Tyler in a graphic print that has serious '70s vibes.
A pregnant Cybill Shepherd (left) wears a sheer flowing gown that was quite daring for the time to meet Queen Elizabeth II.
Enter the 1980s when everything was taken to extremes: extreme volume, extreme proportions, extreme shapelessness. Princess Anne managed to avoid the common pitfalls of the decade's style in an elegant, oversized cape.
All eyes were on Princess Diana during her highly-publicized pregnancy. Everyone's favorite royal made oversized shirt dresses in baby pastels an instant trend with moms-to-be around the world.
Princess Diana continued to rock oversized dresses throughout her first pregnancy.
Diana even managed to mix in the trend for more formal occasions by topping her dress off with a cardigan and pearl choker.
Meryl Streep was a vision in gold as she took home an Oscar for her performance in Sophie's Choice while six months pregnant with her second child. The actress opted for a flowing beaded gown for the moment.
As women were moving out of the domestic domain and into the career world more and more, finding workplace-appropriate maternity wear became a thing to consider for the first time.
These mixed graphic prints have '80s written all over them—but they do look comfortable.
The proportions during this decade were a bit odd, to say the least.
Even Sarah, Duchess of York, couldn't escape the crazy '80s trends during one of her pregnancies.
In 1988, Juicy Couture creators Gela Taylor and Pamela Skaist-Levy designed a line of maternity denim called "Travis Jeans" to fill a void they noticed in stylish clothes for expectant moms. Soon after, Melanie Griffith (pictured here with a very pregnant Demi Moore) wore them while pregnant with daughter Dakota Johnson, which helped propel the line, and maternity jeans in general, to popularity.
The '90s generated an unprecedented level of maternity style consciousness, as the public and media interest in pregnant celebrities skyrocketed. Demi Moore famously posed nude on the cover of Vanity Fair while pregnant, sparking a trend among famous moms-to-be that's still seen today. "It did seem to give a little bit more permission to feel sexy and attractive when you're pregnant," she expressed in her interview with the magazine.
Overalls, like the ones being rocked here by a pregnant Kim Basinger, took over maternity trends in the mid-'90s.
Ah, Kris Jenner. The ultimate #ProudMom.
Julia Louis-Dreyfus harkens back to the middle ages with her empire waist dress, although this one looks far more comfortable.
Pregnant bodies were celebrated in the '90s like never before. With so many high profile celeb moms-to-be, designers took note and the maternity fashion market boomed accordingly. Models like Elle Macpherson, shown here, eschewed baggy, oversized garb for more slim-fitting silhouettes that highlighted their changing shape.
Jada Pinkett Smith proudly shows off her bump on the red carpet in a hugging column dress.
Maternity wear had never been as stylish as it was in the 1990s, as proven by a pregnant Kate Beckinsale.
Victoria Beckham barely had to change her "Posh Spice" look while pregnant in 1999.
Once we hit the early aughts, pregnant women everywhere were showing off their baby bumps without hesitation. Stretchy dresses and belly-baring tops, like the one Jennifer Aniston wore as Rachel Green on Friends, were the norm for expectant moms in the new millennium.
Bodycon dresses, like this one on Cindy Crawford, became a go-to look for women wanting to show off their bumps.
Sarah Jessica Parker channeled her on-screen character Carrie Bradshaw when outfitting her baby bump. Empire waist babydoll dresses made a comeback with pregnant women in the 2000s.
Finally, comfort was key for pregnancy style, as demonstrated by an expecting Kate Moss.
Kate Hudson gave the crop top maternity trend a go while pregnant with her son Ryder.
Reese Witherspoon wore a sweet empire waist dress while pregnant in 2003.
Another look-at-me mom-to-be: pop princess Britney Spears. She drew attention to her baby bump with an arrow on a graphic tank.
Gwyneth Paltrow didn't let a growing bump stop her from sporting couture on the Golden Globes red carpet.
Heidi Klum was a fan of the drop waist while pregnant with her third child in 2006.
Gwen Stefani's maternity style brought out her rocker-chic vibes in full force.
Isla Fisher proudly showed off her bump in a formfitting empire waist dress.
Few celebrities have mastered red carpet maternity style quite like Angelina Jolie. The actress was the picture of elegance in a flowing olive gown in Cannes.
Jennifer Lopez channeled vintage vibes in this shift dress while pregnant with her twins.
Nicole Kidman covered her bump with flowing fabrics and pleats in 2008.
It doesn't get more bump-baring and body-hugging than M.I.A.'s sheer-paneled, polka dot get-up at the 2009 Grammy Awards.
Claudia Schiffer's horizontal stripes minimize the size of her bump while the model lets her bump breathe in a stretchy sweater dress.
There was a wave of models that gave birth in the early 2010s, which did a lot to bring together the worlds of high fashion and maternity style. Miranda Kerr famously walked the runway at Balenciaga's Spring/Summer 2011 show while six months pregnant.
Entering into the second decade of the 21st century, maternity style took a turn for the romantic. Long, flowing, feminine gowns were a favorite amongst pregnant A-listers, like Natalie Portman.
Jessica Alba keeps her bohemian spirit going strong in a gauzy printed maxi skirt.
January Jones belts her bump in a maxi sundress.
Beyoncé takes the floor-length maternity trend to glamorous territory (naturally), opting for an orange one-shoulder gown that made her look like a brilliant Grecian goddess at the 2011 MTV Video Music Awards.
Sienna Miller places her belt beneath her bump for a bohemian look.
Alessandra Ambrosio's silk sheath dress is formfitting yet comfortable.
Adriana Lima rocks a super short bodycon dress while pregnant in 2012.
Kim Kardashian's first pregnancy saw its share of surprise fashion moments. Among them was this floral Givenchy number she wore to the Met Gala in 2013.
Halle Berry's flowing dress was able to accommodate her bump, even towards the end of her pregnancy.
Kate Middleton took her fair share of cues from Princess Diana when it came to dressing her first baby bump. Polka dots and pastels were staples in her royal maternity wardrobe.
When in doubt, throw on an overcoat. Kate Middleton's maternity style was simple and timeless.
Blake Lively's pregnancy with daughter James was smack-dab in the middle of her Preserve phase, which means she wore lots of Lindsey Thornburg cloaks and otherwise artisanal apparel.
Kourtney Kardashian was a pro at pregnancy dressing by the time she was expecting her third child with Scott Disick.
Not long after the birth of Prince George, Kate Middleton was pregnant again with Princess Charlotte. The Duchess' maternity style while carrying her daughter was much the same as the first time, but slightly more polished with tailored, ladylike coats sprinkled into the mix.
The flouncy structure of Kate Middleton's coat dress minimized her bump, much like the styles of the 1940s.
The Duchess sported a belted coat dress for an appearance while pregnant with Princess Charlotte.
Megan Fox opted for a monochromatic look that appears to be as comfortable as it is stylish.
Candice Swanepoel kept things simple in a maxi sundress.
Blake Lively settled rumors of a second baby on the way when she hit the Cannes red carpet with her bump on display in an icy blue Atelier Versace gown.
Meghan Markle announced her pregnancy just before her first royal tour in 2018. The Duchess opted for a combination of high waisted and structured dresses that gave us a peak at her tiny bump.
A favorite of Meghan Markle's while pregnant? Her HATCH maternity jeans. The brand experienced some serious "Markle Sparkle" after the Duchess wore them throughout her royal tour.
Khloé Kardashian kept her bump covered in a monochromatic look while pregnant with her daughter, True Thompson.
Meghan Markle hugs her bump in a one-shoulder black gown at the British Fashion Awards.
A pregnant Cardi B turned heads when she arrived in a bejeweled gown for the Heavenly Bodies: Fashion and the Catholic Imagination-themed Met Gala.
Blake Lively is not one to play it safe with pregnancy fashion, and that was made clear when she announced her third pregnancy wearing a bright yellow sequin dress the premiere of Detective Pikachu.
Meghan Markle led the way in revolutionizing postpartum fashion by re-wearing several of her maternity outfits, like this Martin Grant maxi dress.
Model Ashley Graham shrugged off the idea that you can't be sexy while pregnant by wearing this formfitting dress.
Anne Hathaway opted for pants and a ruffled top that showed off her gorgeous bump at the premiere of Modern Love.
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