Is fertility monitor profitable to sell on Amazon United States?

The niche generates $3.3M/yr across 18 tracked products. 4 of 4 products launched in the last 360 days are still selling. 90-day search growth is -2.0%. Flapen's verdict: Worth a look (55/100).

How competitive is the fertility monitor niche?

8 brands and 16 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in fertility monitor?

Top complaints mined from reviews: Value For Money, Functionality-Overall, Accuracy-Overall. The return rate is 1.4%.

When does demand for fertility monitor peak?

Demand peaks in Jul–Aug–Sep–Oct; the busiest month runs 13.4× the quietest.

What does it cost to enter the fertility monitor niche?

Listings span $20.77–$263.53; the average listing price is $123.33 (sweet spot $15–$100). The average incumbent carries 1,376 reviews — the moat a new listing must climb.

fertility monitor

Worth a look

Shows a $3.3M/yr market, but brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list.

Market size

Incredible$3.3M

$3.3M/yr · 585K searches

Returns

Great1.4%

return rate — above 5% kills the launch gate

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Avg price

Good$123.33

avg listing price — sweet spot $15–$100

Conversion

Good4.6%

search→purchase rate — share of searches ending in a sale

Review moat

Good1,376.33

avg incumbent reviews — the moat a new listing must climb

Competition

Okay62%

top-5 click share — leaders hold, buyers still browse

Price range

Okay$20.77–$263.53

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Bad-2.0%

90-day search growth — must beat 0% to launch

Brand share

Bad94%

top-5 brand share — brand-locked demand

Signals High Price

According to Flapen's Amazon United States niche tracking, fertility monitor is a $3.3M/yr Amazon United States market (585K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Jul–Aug–Sep–Oct. Verdict: Worth a look — 55/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

fertility monitor market data

Units sold / yr: 20K–25K; avg 750–1,000/product
Revenue / yr: $2.5M–$3.1M; units × avg price
Conversion rate: 4.6%
Avg BSR: #244
Page quality: 0%
Prime: 94%
Sponsored: 100%
Out of stock: 1.5%
Avg brand age: 42 months
Avg seller age: 152 days

Competition & brand share

The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.

Brands

8 falling

Sellers

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

62%

Top 20: 100%

Open market

Inito49%
Mira17%
kegg15%
Clearblue8%
Intimate Rose5%
VOZTOLLS3%
Open — no brand owns it (2 brands, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -2.0% search growth over the last 90 days.

Peak months: Jul, Aug, Sep, Oct · busiest ÷ quietest = 13.4×

Open Trend

Top fertility monitor search terms

inito122K/yr +16.6%5.3% conv.
inito fertility monitor129K/yr +1.6%4.4% conv.
kegg fertility tracker94K/yr -27.0%2.9% conv.
kegg51K/yr -21.6%2.5% conv.
mira fertility tracker31K/yr -3.3%2.0% conv.
fertility monitor32K/yr -12.5%1.0% conv.
clearblue fertility monitor22K/yr +9.1%7.4% conv.
proov22K/yr -14.4%2.0% conv.
mira hormone monitor11K/yr +5.9%0.9% conv.
inito fertility4K/yr +253.8%4.0% conv.

All search terms

Top fertility monitor products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Inito Fertility Monitor & Hormone Tracker for Women | Track and Confirm Ovulation | Measures Estrogen LH PdG FSH | Includes 15 Strips + Free app (Compatible with All iPhones)

Inito$129.354.3★1,670 rev

kegg Fertility Tracker + Free Fertility App | Discover Your Most Fertile Days | No Recurring costs | Predicts Fertile Window | Helps Exercise Pelvic Floor Muscles

kegg$263.534.1★465 rev

Mira Fertility MAX Ovulation Predictor Kit for Women with 20 Ovulation Test Sticks Digital Ovulation Tracker & Easy to Use Mira App Monitor PdG LH & E3G at Home Individual Ovulation Test Strips

Mira$214.903.8★196 rev

Inito Fertility Monitor & Hormone Tracker for Women | Estrogen LH PdG (Urine Metabolite of progesterone) FSH | Track and Confirm Ovulation | Includes 15 Strips (Compatible with iPhone 16 Pro)

Inito$110.494.3★1,670 rev

Inito Fertility Monitor & Hormone Tracker for Women | Estrogen LH PdG (Urine Metabolite of progesterone) FSH | Track and Confirm Ovulation | Includes 15 Strips (Compatible with iPhone 15 Pro)

Inito$110.324.3★1,670 rev

Newest

by launch date

Inito$130.9623 rev

2mo ago

Inito Fertility Monitor & Hormone Tracker for Women | Track and Confirm Ovulation | Measures Estrogen LH PdG FSH | Includes 15 Strips + Free app (Compatible with All iPhones)

Inito$129.351,670 rev

2mo ago

Mira Ultra4 Fertility Monitor & Ovulation Test Kit for Women at-Home 4-Hormone Tracker (LH FSH E3G PdG) Digital Analyzer with 20 Test Wands 7 More Accurate Than Other Fertility Trackers

Mira$222.8843 rev

9mo ago

Mira Ultra4 Fertility Monitor & Ovulation Test Kit for Women at-Home 4-Hormone Tracker (LH FSH E3G PdG) Digital Analyzer with 30 Test Wands 7 More Accurate Than Other Fertility Trackers

Mira$241.6343 rev

9mo ago

Womens Wide Leg Jeans Low Rise Baggy Straight Leg Boyfriend Denim Pants Casual Loose Jeans Y2K Girl Style White

Generic$20.7743 rev

1y ago

What buyers say about fertility monitor

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use16%

“easy to insert”

Value For Money11%

“Best money spent”

Fertility/Conception9%

“This is a great for trying to conceive”

Quality-Overall8%

“Excellent product”

Hormonal Balance8%

“Overall, this is a really helpful tool if youre tracking cycles and hormones”

Efficiency5%

“works well”

Comfort-Overall4%

“It is comfortable”

Health Monitoring3%

“it tracks EVERYTHING”

Soft Feel3%

“The material feels soft”

Assembly/Installation3%

“Super easy to set up”

What buyers complain about

Value For Money19%

“Little expensive”

Functionality-Overall15%

“the app failed to record many of my readings”

Accuracy-Overall7%

“Ineffective and Misleading”

Ease Of Use7%

“Difficult to use”

Advertised Vs Actual Product4%

“Doesnt fit as prescribed”

Connectivity-Overall4%

“it doesnt always connect”

Charging3%

“found it melting at the charge port”

Durability3%

“Broken”

Software/Application3%

“Won't connect to their app Can't do anything with it”

Size-Overall2%

“Doesnt fit as prescribed”

Top return reasons

Functionality-Overall24%

Value For Money13%

Compatibility-Overall12%

Size-Overall11%

Advertised Vs Actual Product8%

Measurement/Reading Accuracy5%

Accuracy-Overall4%

Product Condition4%