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Trial registered on ANZCTR

Registration number
Ethics application status
Submitted, not yet approved
Date submitted
Date registered
Date last updated
Type of registration
Prospectively registered

Titles & IDs
Public title
Blackmore’s Conceive Well Men vs placebo in men with low sperm count and motility
Scientific title
A double-blind, randomised controlled trial on the efficacy of Blackmore’s Conceive Well Men in men with oligozoospermia and asthenozoospermia
Secondary ID [1] 295240 0
Nil known
Universal Trial Number (UTN)
Nil known
Trial acronym
CONTROLAS (COnceive Well Men TReatment of OLigozoospermia and ASthenozoospermia) study.
Linked study record
Nil known

Health condition
Health condition(s) or problem(s) studied:
Oligozoospermia (low sperm concentration) 308408 0
Asthenozoospermia (low sperm motility) 308409 0
Condition category
Condition code
Reproductive Health and Childbirth 307399 307399 0 0
Fertility including in vitro fertilisation

Study type
Description of intervention(s) / exposure
Brief name: CONTROLAS (COnceive Well Men TReatment of OLigozoospermia and ASthenozoospermia) study
The drug is, Conceive Well Men (ARTG ID: 232543), it’s a conventional antioxidant supplement preparation in tablet form with the following active ingredients per tablet:
Ascorbic acid (vitamin C) 250 milligrams
Cholecalciferol (vitamin D3) 15 micrograms
Cyanocobalamin (vitamin B12) 33 micrograms
d-alpha-Tocopheryl (vitamin E) 67.07 milligrams
Folic acid 450 micrograms
Selenomethionine (selenium) 372 micrograms
Ubidecarenone (coenzyme Q10) 45 milligrams
Ubiquinol-10 (ubiquinol) 45 milligrams
Zinc amino acid chelate (zinc) 75 milligrams

For the intervention, the dose: 3 tablets daily, the duration: 6 months, and the mode: oral tablet.

Intervention adherence will be assessed by these monthly followup calls that HX makes to the participants, the 3rd and 6th month study visits by HX will check on the participant’s medication intake by tablet count.
Intervention code [1] 301578 0
Treatment: Drugs
Comparator / control treatment
Glucose capsule, taken 2 tablets daily for 6 months.
Control group

Primary outcome [1] 306369 0
Sperm concentration (million/mL)
Timepoint [1] 306369 0
Baseline, 3 months post-baseline and 6 months post-baseline (primary timepoint)
Primary outcome [2] 306370 0
Sperm total motility (%)
Timepoint [2] 306370 0
Baseline, 3 months post-baseline and 6 months post-baseline (primary timepoint)
Secondary outcome [1] 348276 0
Pregnancy of participants partners (positive/negative) by urine test. This test and its results are performed and derived by the subject's partners.
Timepoint [1] 348276 0
3 months post-baseline and 6 months post-baseline
Secondary outcome [2] 348618 0
Sperm morphology (%)
Timepoint [2] 348618 0
3 months post-baseline and 6 months post-baseline

Key inclusion criteria
1. Gender: Men
2. Men with female partners who are interested in conceiving
3. A semen analysis in the previous 3 months that result in a sperm count of less than 15 million/ml or sperm motility of less than 30%
Minimum age
18 Years
Maximum age
No limit
Can healthy volunteers participate?
Key exclusion criteria
1. On antioxidant supplements, iron, folic acid or omega three supplements or any nutritional male fertility supplements that affect semen quality in the previous 3 months
2. Had surgical male fertility treatment in medical history

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Central randomisation by computer
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple computerised randomisation using a software
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s
The people administering the treatment/s
The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Other design features
Phase 4
Type of endpoint(s)
Statistical methods / analysis
The intended sample size for the project is 100. This study is a RCT and to set the sample size in the range of sample sizes from similar RCTs in PubMed will justify the aims of this study, because the other sample sizes have justified those similar RCTs in PubMed. There are 6 PubMed RCTs investigating the efficacy of antioxidants in managing male infertility in the form of low sperm count and low sperm motility. The sample size of these RCTs range from 31 to 173. Therefore a sample size of 100 was selected, because 5 out of 6 RCTs had sample sizes less than this magnitude. To confirm the justification, a power calculation using the result data from one of these RCTs (Suzuki et al. 2003), where the sample size was set to 100, returned 79%. Therefore an intended sample size of 100 is justified. The contingency plan for participant drop out rates is to replace these drop outs with new recruits until the 100 sample size is complete.

The statistical method, ANOVA will compare the active and placebo participant semen parameters to the baseline descriptors. The baseline descriptors will show the means and standard deviations for continuous variables, and frequencies and percentages for categorical variables.

Suzuki M, Kurabayashi T, Yamamoto Y, Fujita K and Tanaka K 2003, ‘Effects of antioxidant treatment in oligozoospermic and asthenozoospermic men’, The Journal of Reproductive Medicine, vol. 48, no. 9, pp. 707-712.

Recruitment status
Not yet recruiting
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)
Recruitment hospital [1] 11179 0
St George Private Hospital - Kogarah
Recruitment postcode(s) [1] 23020 0
2217 - Kogarah

Funding & Sponsors
Funding source category [1] 299830 0
Commercial sector/Industry
Name [1] 299830 0
Address [1] 299830 0
20 Jubilee Avenue, Warriewood NSW 2102, Australia
Country [1] 299830 0
Primary sponsor type
Henry Xiao
High Street, University of New South Wales, Kensington NSW 2052
Secondary sponsor category [1] 299184 0
Name [1] 299184 0
Michael Chapman
Address [1] 299184 0
Suite 15, Level 3, 1 South Street, St George Private Hospital, Kogarah NSW 2217
Country [1] 299184 0

Ethics approval
Ethics application status
Submitted, not yet approved
Ethics committee name [1] 300708 0
The University of New South Wales Research Ethics Committee
Ethics committee address [1] 300708 0
Human Ethics Office, Gate 2, High Street, University of New South Wales, Sydney NSW 2052
Ethics committee country [1] 300708 0
Date submitted for ethics approval [1] 300708 0
Approval date [1] 300708 0
Ethics approval number [1] 300708 0

Brief summary
This will be a double-blind, randomised, placebo-controlled clinical trial. The primary aim of this trial is to assess whether an over-the-counter (OTC) nutritional supplement can improve sperm quality in 100 men and the pregnancy rates of their partners when compared to the placebo for 6 months. All participants will take 3 capsules per day for 6 months or 180 days, a total of 540 capsules/participant. Changes in quality will be based upon sperm concentration or motility. This OTC supplement, called “Conceive Well Men”, will be donated free-of-charge by Blackmores. The supplement is produced under the good manufacturing practice (GMP) and meets TGA standards as a ‘listed’ product, which indicates safety and quality. The importance of undertaking this project is to emphasise the role of sperm health as male infertility has become an increasing factor in managing infertility.
Trial website
Trial related presentations / publications
Public notes
Attachments [1] 2778 2778 0 0

Principal investigator
Name 84554 0
Mr Henry Xiao
Address 84554 0
High Street, University of New South Wales, Kensington NSW 2052
Country 84554 0
Phone 84554 0
+61 429 389 616
Fax 84554 0
Email 84554 0
Contact person for public queries
Name 84555 0
Mr Henry Xiao
Address 84555 0
High Street, University of New South Wales, Kensington NSW 2052
Country 84555 0
Phone 84555 0
+61 429 389 616
Fax 84555 0
Email 84555 0
Contact person for scientific queries
Name 84556 0
Mr Henry Xiao
Address 84556 0
High Street, University of New South Wales, Kensington NSW 2052
Country 84556 0
Phone 84556 0
+61 429 389 616
Fax 84556 0
Email 84556 0

No information has been provided regarding IPD availability
Summary results
No Results