COPYRIGHTED MATERIAL. NOT FOR REPRINT. The Journal of Reproductive Medicine® A Nutritional Supplement for Improving Fertility in Women A Pilot Study Lynn M. Westphal, M.D., Mary Lake Polan, M.D., Ph.D., M.P.H., Aileen Sontag Trant, Ph.D., and Stephen B. Mooney, M.D. OBJECTIVE: To determine the impact of nutritional
P = .04). The placebo group (n = 15) did not show any no-supplementation on optimization of reproductive healthtable changes after treatment in any of the parameters[This product] is a well-tolerated supplement that could be an attractive option for the optimization were (P < .01). No signifi- of reproductive health in some women. arginine, vitamins (including folate) and minerals.tional fertility therapy. (J Reprod Med 2004;49:289–
Changes in progesterone level, basal body temperature,menstrual cycle, pregnancy rate and side effects weremonitored.Keywords: infertility, female; nutritional support; RESULTS: Thirty women aged 24–46 years who hadtried unsuccessfully to conceive for 6–36 months com-pleted the study. After 3 months, the supplement group
One of every 6 couples in the United States, and 1 of
(n = 15) demonstrated a trend toward an increase in
every 3 couples in their late 30s, have difficulty con-
mean midluteal phase progesterone level (from 8.2 to
ceiving a child. In 30% of these couples, the man is
12.8 ng/mL, P = .08) and a significant increase in the av-
infertile or subfertile; another 30% have difficulty
erage number of days in the cycle with basal tempera-
conceiving due to female fertility issues. The re-
tures > 37°C during the luteal phase (6.8–9.7 days,
maining third is attributable to both male and fe-
From the Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, and Daily Wellness Co., Sunny-vale, California.
Supported in part by the Asian Cultural Teaching Foundation.
Address reprint requests to: Lynn M. Westphal, M.D., Department of Obstetrics and Gynecology, Stanford University School of Medi-cine, 300 Pasteur Drive, Stanford, CA 94305 (lynnw@stanford.edu). Financial Disclosure: Dr. Trant is Director of Research and Development, Daily Wellness Co., manufacturer of FertilityBlend,TM the sub-ject of this study. Dr. Polan is on the Scientific Advisory Board of Daily Wellness Co. and has options in the company. Daily Wellness Co. provided the authors with a grant to continue this study.
0024-7758/04/4904-0289/$15.00/0 Journal of Reproductive Medicine®, Inc. The Journal of Reproductive Medicine®
The Journal of Reproductive Medicine®
male issues or has an unknown cause. In many of
gestation. Vitex functions in a more natural and
these cases, the infertility problems are treatable. If
gentle fashion with the body to harmonize hormon-
low fertility is due to a hormonal imbalance or nu-
al balance. Vitex has also been shown to reduce PMS
tritional deficiencies, nutritional supplementation
symptoms and other menstrual cycle irregu-
may play an important role and should be consid-
ered a reasonable method of optimizing reproduc-
Vitamin B (pyridoxine) has been shown to im-
prove conception rates as well as to treat PMS
Good nutrition and a healthful lifestyle can have
symptoms, but whether this is due to primary
a positive effect on fertility and childbearing. For
insufficiency is unclear.8 Vitamin B ,9 folic acid,10
example, an adequate intake of essential nutrients,
vitamin E,11 multivitamins,12 magnesium,13 seleni-
such as folic acid, in the periconceptual period can
um13, iron14 and zinc15 have been shown to im-
lower the incidence of neural tube defects. Vita-
mins, minerals and specific cofactors play a major
Antioxidants may be helpful in reducing oxida-
role in fertility function, although this is still an area
tive stress to ova, sperm and reproductive organs.
that needs further investigation. William Keye, Jr.,
Vitamins C and E are usually used for this purpose,
M.D., President of the American Society for Repro-
but green tea may work equally as well. In studying
ductive Medicine, commented, “The more we dis-
the effects of caffeine on conception (usually con-
cover about the effects of nutrition on fertility, the
sidered a negative effect), Caan et al17 found that
better advice we can give our patients.”1
drinking tea (as opposed to other caffeinated bever-
Hormonal imbalance can be determined by blood
ages) approximately doubled the odds of concep-
tests of reproductive hormone levels. Measuring
follicle-stimulating hormone, luteinizing hormone
L-arginine, an amino acid, helps improve circula-
(LH) and estrogen on day 3 and progesterone on
tion to the reproductive organs; that may enhance
day 21 (luteal phase) of a normal cycle can indicate
oocyte development and implantation of the em-
whether the hormonal state is compatible with
bryo. Battaglia et al18 monitored uterine and follic-
pregnancy. Abnormal LH or progesterone produc-
ular Doppler flow in response to L-arginine treat-
tion may result in an abnormal monthly basal body
ment during in vitro fertilization treatment cycles in
temperature chart. If progesterone is low, basal
poor responders. The L-arginine–treated group
body temperature may not increase during the sec-
demonstrated improved Doppler flow rates, a
ond half of the cycle after ovulation. Without suffi-
lower cancellation rate and an increased number of
cient progesterone, the endometrium is not ade-
oocytes collected and embryos transferred. Of the
quately prepared for implantation of an embryo.
17 women in the L-arginine supplementation
Vitex agnus-castus is an herb used to optimize
group, 3 became pregnant as compared to zero of
luteal phase function. Clinical studies in Europe2-4
the 17 in the nonsupplemented group.
used Vitex successfully to restore progesterone bal-
As a result of both the documented and proposed
ance and improve fertility. In one study,2,3 39 of 45
mechanisms of various natural products, it was
women treated with Vitex tincture (40 drops)
postulated that a combination regimen (Fertility-
demonstrated increased progesterone levels, with 7
BlendTM, Daily Wellness Co., Sunnyvale, Califor-
becoming pregnant within 3 months. In another
nia), as a systematically designed blend of natural
study,4 among 67 infertile women with oligomen-
products, might provide a synergistic impact in
orrhea or amenorrhea, those treated with a homeo-
support of human reproductive health.
pathic Vitex preparation demonstrated increases inspontaneous menstruation, shorter cycles, earlier
Materials and Methods
ovulation, improved progesterone levels during the
Thirty women, aged 24–46 years, who had tried un-
luteal phase and more pregnancies. Loch et al5
successfully to conceive for 6–36 months, were en-
noted an increase in the pregnancy rate in women
rolled in the study, and completed the 3-month
taking Vitex in a study of its effects on premenstru-
trial. Written, informed consent was obtained from
al syndrome (PMS) symptoms. No serious side ef-
each participant before entry into the study. Institu-
fects were noted in that study of 1,634 women in
tional review board approval was obtained. None
Germany. One advantage of using Vitex rather than
of the participants received any pharmacologic
the commonly prescribed fertility medication,
treatments for infertility during the course of the
clomiphene citrate, is the decreased risk of multiple
study or for at least 1 month prior to enrolling. Of
Volume 49, Number 4/April 2004
the 30, 15 received placebo, and 15 received Fertili-
cause of infertility (Table I). More women had pre-
tyBlendTM, administered in a randomized, double-
viously been pregnant in the placebo group; that
blind, placebo-controlled fashion. Supplements
could be considered a positive bias for that group,
were taken daily, 3 capsules per day (could be taken
although no one conceived in that group during the
at one time), for 3 menstrual cycles after initial base-
line measurements. All subjects received an addi-
After 3 months, an increase in mean midluteal
tional 3 months of supplement after successful
phase progesterone levels was noted in the supple-
completion of the study. FertilityBlendTM is a pro-
ment group (8.2–12.8 ng/mL, P = .08), whereas the
prietary, natural nutritional supplement containing
levels in the placebo group remained relatively con-
chasteberry and green tea extracts; the amino acid
stant (11.4–12.3 ng/mL, P = .38 [Figure 1]). The sup-
L-arginine; vitamins E, B , B and folate; iron; mag-
plement group also demonstrated an increase in the
nesium; zinc and selenium. Changes in midluteal
average number of days in the cycle with basal tem-
phase progesterone level and basal body tempera-
peratures > 37°C during the luteal phase (6.8–9.7
ture, as well as length of menstrual cycle, pregnan-
days, P = .04 [Figure 2] ). The placebo group re-
cy rate and incidence of side effects, were moni-
mained relatively constant in luteal temperatures
tored. Progesterone levels were evaluated via
> 37°C, with an average of 6.7 days > 37°C at month
immunoassay. Luteal measurements were made at
1 and 6.5 at month 3 (P = .44). Neither group exhib-
baseline and after 3 months of nutritional supple-
ited any consistent patterns in cycle length changes
(Table II), although 4 of the 15 women in the sup-plement group moved toward a more normal,
Results
28–30-day cycle from shorter or longer cycle
Mean age, weight and number of months attempt-
ing to conceive were similar (P > .10) for the women
By the end of the 3-month study, 4 of the 15
in the supplement and placebo groups (Table I).
women in the FertilityBlendTM group were preg-
Mean ages for the supplement and placebo groups
nant (27%) as compared to none in the placebo
were 34.3 and 35.3 years of age, respectively; aver-
group (P = .02 [Table I]). An additional subject be-
age weights for both groups were 64.5 kg, and
came pregnant during her fifth month on the sup-
lengths of time attempting to conceive (before the
plement (33%, P < .01). (All subjects were given a 3-
study) were 16.8 and 14.2 months, respectively.
month supply of free supplement after completing
There were no significant differences between the 2
the study.) The 5 women who became pregnant
groups in regard to previous evaluation and the
ranged in age from 24 to 38 years (mean, 32.4) andhad been attempting to conceive for 6–30 months(mean, 15.6). Two had abnormally low proges-
Table I Patient Characteristics and Pregnancy Rates in the
terone levels initially. The 4 who were pregnant in
the first 3 months all demonstrated an increase in
Supplement
the number of days with temperatures > 37°C on
Characteristic mean (n = 15) mean (n = 15)
their basal temperature charts. The subject who was
pregnant after 5 months on the supplement did not
show this temperature rise until later. Two noted
distinct signs of ovulation on their temperature
charts that they had not observed before. Ovulation
was confirmed by home ovulation kit.
The pregnancies resulted in 4 healthy, live births.
One pregnancy resulted in a miscarriage; implanta-
tion on a leiomyoma appeared to contribute to this
loss. After the study was completed, 1 of the pa-
tients in the placebo group switched to the supple-
ment and conceived 2 months later. This pregnancyalso resulted in a healthy, live birth.
*Months of actively trying to conceive. aStatistically higher number than in placebo group at P = .02, Bayesian bi-
No significant side effects were noted in the
study. Three women in the active group (none in
Significantly higher number than in placebo group at P = .02 and P < .01,
respectively, Bayesian binomial analysis.
the placebo group) complained of slight nausea
The Journal of Reproductive Medicine® Mean progesterone level (ng/mL) FertilityBlend P= .08 Figure 1 Mean progesterone levels at baseline and after 3 months of FertilityBlendTM Supplement (N = 30).
when taking the supplement on an empty stomach,
noted irregular cycles. Since this was the first time
but that was corrected by taking it with food. Two
many of these women had charted their basal body
women in the supplement group noted that their
temperature, they may have become more aware of
menstrual cycles were more regular, 2 noted short-
ened cycles, and 1 noted more erratic cycles. Of the14 women on the supplement, 1 noted less spotting
Discussion
Nutritional supplementation may play an impor-
placebo noted increased PMS symptoms, and 4
tant role in optimizing fertility health, leading to
Mean Number Days (N=30) 2.0 Figure 2 Mean number of
days > 37°C in the lutealphase on the basal
Month of Fertility Study Volume 49, Number 4/April 2004 Table II Comparison of Progesterone Levels, Days > 37°C on
yashree Kelshikar and the REI Laboratory, Stanford
Basal Temperature Chart (Luteal Phase) and Menstrual
Hospital, which performed the progesterone analy-
Cycle Length Between the Supplement and Placebo Supplement References Variable mean (n=15) mean (n=15)
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Significantly higher than initial time value at P = .08, 1-tailed t test.
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Acknowledgments
18. Battaglia C, Salvatori M, Maxia N, et al: Adjuvant L-arginine
treatment for in-vitro fertilization in poor responder pa-
Many thanks for help with the study from Bhag-
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