What
aberrations in menst cyclicity will pinpoint for PCO?? . The consensus committee in July 19,
2018:--This committee in contrast to NIH, Rotterdam ,Androgen Excess Society,
& And Excess & PCOS committee It was framed by total
37 societies and organizations
covering 71 countries
engaged in the process of
consensus statement released in July
2018. .This consensus was headed by “The
Australian centre for Research
Excellence in PCOS” and funded by
NHMRC led and primarily funded the guideline development. They partnered
with the American Society for Reproductive Medicine
and the European society of Human Reproduction and Embryology in this
Endeavour. Thirty five other
societies partnered including FOGSI and
the PCOS society of India.
Coming back to diagnosing
PCO based on menst irregularities the point of consideration was which kind of
irregular cycles is to be
considered relevant ? The committee
members more clearly stressed on gynecological age in this issue..
Irregular menstrual cycles
are defined as :
A) Cycles were normal in the first year post menarche as part of
the pubertal transition , 1 to < 3 years post menarche with
cycle length < 21 or > 45
days .B) Three years post menarche to perimenopause < 21 or
> 35 days or < 8 cycles
per year C) one year post menarche > 90 days for any one cycle.
II. Primary amenorrhea by age 15 or > 3 years post thelarche
When irregular menstrual
cycles are present a diagnosis
of PCOS should be considered
Androgens to be measured in the diagnosis of biochemical
hyperandrogenism are specified along with optimal assays.
Calculated free
testosterone, free androgen index or
calculated bioavailable
testosterone should be used in assess biochemical hyperandrogenism in the diagnosis
of PCOS .High quality assays such
as liquid chromatography mass
spectrometry and extraction
chromatography immunoassays should be
used for the most accurate assessment of total or free testosterone in PCOS.
Androstenedione and dehydroepiandrosterone sulfate could be considered if total or free
testosterone are not elevated however these provide limited additional
information in the diagnosis of PCOS. C)
In women on hormonal contraception
drug withdrawal is recommended for 3 months
or longer before measurement .
How important is AMH in the diag of PCO??
AMH levels should
not yet to be used as an alternative test for PCOM or single test for diagnosis of PCOS,
Cardiovascular disease risk
All women with PCOS should be assessed for cardiovascular risk factors including
A) obesity B) cigarette smoking C)
dyslipidemia D) hypertension E)
impaired glucose tolerance and F) lack of physical activity. Weight height and ideally waist circumference should be
measured and BMI must be calculated. Overweight and obese women with PCOS
regardless of age should have a
fasting lipid profile. Blood pressure
must be measured annually .Gestational
diabetes glucose tolerance and type2
diabetes are common and PCOS
women are at 5 fold increased risk for these complications.
Glycemic status should be
assessed in all women with PCOS. A) An
oral glucose tolerance test B)
fasting plasma glucose or C)
HbA1c should be performed to assess
glycemic status . In high risk women with
PCOS an OGTT is recommended.
Anxiety
depressive symptoms psychosexual health and impact on body image should
be routinely screened in all adolescents and women with PCOS
at diagnosis.
Lifestyle modifications : Preferably multi component
including diet
exercise and behavioral
strategies should be recommended
Achievable goals such
as 5%- 10% weight loss in 6 months in those with excess weight
yields significant clinical
improvements.
Exercise
Health professional should
encourage and advise exercise for the prevention of weight gain and
maintenance of health .
Pharmacological treatment for non fertility indications A)
For hyperandrogenism and / or
irregular menstrual cycles .Combined oral contraceptive pills
should be recommended to manage
hyperandrogenism and / or irregular
menstrual cycles preferably
lower dose and natural estrogen
preparations.
Metformin When in PCOS?? Ans;- women with BMI > 25 kg / m2 and most
beneficial in women with impaired OGTT or high risk ethnic groups when should be considered if COCP and lifestyle changes alone are not successful. Metformin can be considered in PCOS women with
BMI > 25 kg / m and most beneficial in women with impaired OGTT or
high risk ethnic groups.
Starting at a low dose
with 500 mg increments one two weekly and extended release
preparation may minimize side effects.
Antiandrogens when ?? Ans;-Antiandrogens should only be considered
to treat hirsutism if 6 months or more of
cop and cosmetic therapy have
been unsuccessful
Inositol should currently
be considered as an experimental therapy
in PCOS with emerging evidence on
efficacy highlighting the need for
further research
Assessment and treatment
of infertility
Ovulation induction Principles
The use of ovulation
induction agents including A)
letrozole B) metformin and C) clomiphene citrate are off label in many countries. Where off label
use of ovulation induction agents
is allowed women need to be
informed of the evidence concerns and
side effects.
Step 1:-Pregnancy needs to be excluded before ovulation
induction Step 2 :-Unsuccessful and
prolonged use of ovulation induction
agents should be avoided due to
poor success rates. Step 3
:-Letrozole should be considered the first
line pharmacologic agent for ovulation induction in women with PCOS Step
4:-Clomiphene citrate could be used alone in women with PCOS with anovulatory infertility and
no other infertility factors. Step 5
:-Combining clomiphene citrate
with metformin improves ovulation and
pregnancy rates in PCO women
who are clomiphene resistance and
with no other cause of infertility Step 6 :-Gonadotropins could be used as
second line agents in women with PCOS
who have failed first line
oral ovulation induction therapy but before attempting at gonadotrophins one should consider Cost and
availability ,expertise required for use
in ovulation induction. Degree of intensive
ultrasound monitoring required. Of note that theta is lack of difference in clinical efficacy of available gonadotrophin preparations.
Low dose gonadotrophin protocols to optimize monofollicular
development, risk and implications of
potential multiple pregnancy
Laparoscopic ovarian surgery
when?? Ans:-Laparoscopic ovarian
surgery could be considered second line
therapy for women with PCOS who are clomiphene citrate resistance with
anovulatory infertility and no their
infertile factors ,.But where
laparoscopic ovarian surgery is to be recommended the
following need to be considered
Comparative cost ,expertise required for use in ovulation
induction ,intra operative and
post operative risks are higher in women who are
overweight and obese ,there may be
a small associated risk of lower
ovarian reserve or loss of
ovarian function and peri adnexal
adhesion formation may be an
associated risk.
In vitro fertilization when in PCO?? Ans:-It is as third line therapy. In vitro fertilization should be considered
even in the absence of an absolute indication for IVF / ICSI )say tubal block/
endometriosis) in those PCO women with
long infertility as third
line therapy where first or second
line ovulation induction therapies
have failed.
National
Institutes of Health (NIH) 1990 Criteria for PCOS
The
definition of PCOS most commonly used today arose from the proceedings of an
expert conference sponsored by the NIH in April 1990 (i.e.NIH 1990 criteria). All those attending were queried
regarding what they believed were diagnostic criteria of PCOS. Tabulation of
the results indicated that 64%, 60%, 59%, 52%, and 48% thought that
hyperandrogenemia, exclusion of other etiologies, exclusion of congenital
adrenal hyperplasia (CAH), menstrual dysfunction, and clinical
hyperandrogenism, respectively, were criteria that were definite or probable
for the disorder (5). The proceeding then summarized these results into the
following major research criteria (in order of importance): 1) hyperandrogenism
and/or hyperandrogenemia, 2) oligoovulation, and 3) exclusion of known
disorders, such as Cushing’s syndrome, hyperprolactinemia, and CAH (5) (Table
1). A fourth criterion, polycystic ovaries on ultrasound, was considered
particularly controversial. In essence, the results of this expert conference
identified PCOS as a disorder of ovarian androgen excess.
TABLE 1.
Current
criteria for the definition of PCOS
Study
|
Criteria
|
NIH,
1990 (5 )
|
To
include all of the following:
|
|
1)
Hyperandrogenism and/or hyperandrogenemia
|
|
2)
Oligoovulation
|
|
3)
Exclusion of related disorders
|
ESHRE/ASRM
(Rotterdam), 2003 (6, 7 )
|
To
include two of the following, in addition to exclusion of related disorders:
|
|
1)
Oligo- or anovulation
|
|
2)
Clinical and/or biochemical signs of hyperandrogenism
|
|
3)
Polycystic ovaries
|
Rotterdam
2003 Criteria for PCOS: Introducing Two New Phenotypes
Another
expert conference was organized in Rotterdam in May of 2003, sponsored in part
by the European Society for Human Reproduction and Embryology and the American
Society for Reproductive Medicine (i.e.Rotterdam
2003 criteria). The proceedings of the conference noted that PCOS could be
diagnosed, after the exclusion of related disorders, by two of the following
three features: 1) oligo- or anovulation, 2) clinical and/or biochemical signs
of hyperandrogenism, or 3) polycystic ovaries (6, 7) (Table 1).
We
should note that the Rotterdam 2003 criteria did not replace the NIH 1990
criteria, because all women diagnosable by the NIH 1990 criteria would also
meet the Rotterdam definition (Table 2). Rather, it expanded the definition of
PCOS, adding two additional phenotypes as PCOS, including women with 1)
polycystic ovaries and clinical and/or biochemical evidence of androgen excess,
but without ovulatory dysfunction, and 2) polycystic ovaries and ovulatory
dysfunction, but without hyperandrogenemia and/or hirsutism (i.e. no signs of androgen
excess). To begin to determine whether these phenotypes truly represent PCOS,
it is useful to review how syndromes are defined.