Subfertility

Subfertility refers to any form of reduced fertility and is characterized by a longer than average time to conceive, despite regular unprotected sexual intercourse.

Quick Answer

What it is

Subfertility refers to any form of reduced fertility and is characterized by a longer than average time to conceive, despite regular unprotected sexual intercourse.

Key findings

  • Grade A: LH Secretion (Kisspeptin-54)
  • Grade A: FSH Secretion (Kisspeptin-54)
  • Grade B: Reproductive Hormone Recovery (Hypothalamic Amenorrhea) (Kisspeptin-54)

Safety

No specific caution or interaction language was detected in the current summary/outcome notes.

ℹ️ Quick Facts

Quick Facts: Subfertility

  • Supplements Studied:1
1 supps · 3 outcomes

Evidence-Based Protocol

Supplement stack ranked by research quality

Moderate Evidence

Primary Stack (Tier 1)

400-800mcg methylfolate daily (women); 400mcg daily (men)

Essential for both male and female fertility; critical for early fetal development; reduces neural tube defects

30 studies | 5,000 participants
200-600mg daily

Supports egg and sperm quality; improves mitochondrial function in gametes; studied in both sexes

15 studies | 1,000 participants

Supporting Stack (Tier 2)

2-3g EPA+DHA daily

Supports hormone production and egg/sperm membrane health; anti-inflammatory

12 studies | 800 participants
2000-4000 IU daily (maintain 40-60 ng/mL)

Supports reproductive hormone function; deficiency linked to infertility in both sexes

15 studies | 1,500 participants
15-30mg daily

Essential for sperm production and quality; supports ovulation in women

12 studies | 800 participants
2-3g daily (for men)

Supports sperm motility and energy; studied for male subfertility

10 studies | 600 participants
100-200mcg daily

Antioxidant; essential for sperm motility; supports thyroid function important for fertility

8 studies | 500 participants
2-4g daily (for women, especially with PCOS)

Particularly helpful for PCOS-related infertility; improves egg quality and ovulation

15 studies | 1,500 participants
400 IU daily

Antioxidant; supports sperm membrane health; may improve endometrial lining

8 studies | 400 participants
25-75mg daily (for women with diminished ovarian reserve, under medical supervision)

May improve ovarian reserve in women with diminished response; use under medical supervision

10 studies | 800 participants

How It Works

Subfertility (reduced fertility) affects about 1 in 6 couples trying to conceive. It can be caused by female factors (ovulation problems, tubal issues, endometriosis), male factors (low sperm count/motility), or a combination. In many cases, no clear cause is found.

COMMON CAUSES:

Female factors:

Ovulation disorders (PCOS, thyroid issues)
Tubal blockage or damage
Endometriosis
Uterine abnormalities
Age-related egg quality decline

Male factors:

Low sperm count or motility
Abnormal sperm shape
Hormonal imbalances
Varicocele
Lifestyle factors

WHEN TO SEE A SPECIALIST:

After 12 months trying (under age 35)
After 6 months trying (over age 35)
Known fertility risk factors
Irregular or absent periods

LIFESTYLE FACTORS that affect fertility:

Healthy weight (both partners)
No smoking
Limited alcohol
Reduced stress
Regular exercise (moderate)
Healthy diet

* Folate is essential for both partners and critical for preventing neural tube defects.

* CoQ10 supports egg and sperm quality by improving mitochondrial function.

* Myo-Inositol is particularly helpful for women with PCOS.

* Zinc, Selenium, and L-Carnitine support male fertility.

* DHEA may help women with diminished ovarian reserve (use under medical supervision).

Expected timeline: Egg and sperm development takes about 3 months, so supplements should be started at least 3 months before trying to conceive. Effects may take several months to manifest.

Generated from peer-reviewed researchSchema v2.0

Detailed Outcomes

A
LH Secretion
Kisspeptin-54 potently stimulates LH release in healthy women and those with hypothalamic amenorrhea, with effects similar to or exceeding exogenous GnRH.
largeImproves
A
FSH Secretion
Acute kisspeptin administration increases FSH secretion as part of the coordinated gonadotropin response through the hypothalamic-pituitary axis.
moderateImproves
B
Reproductive Hormone Recovery (Hypothalamic Amenorrhea)
Twice-weekly kisspeptin-54 administration for 8 weeks stimulated reproductive hormone release in women with hypothalamic amenorrhea, though chronic administration shows tachyphylaxis.
moderateImproves

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